The evidence behind the atlas

Cited sources

• Regular aerobic activity lowers cardiovascular risk.

  American Heart Association · 2024 — referenced on the Heart guide

  Professional cardiology guidance recommends at least 150 minutes of moderate aerobic activity weekly for cardiovascular health.

• Excess sodium intake raises blood pressure.

  World Health Organization · 2023 — referenced on the Heart guide

  Population-level guidance recommends limiting sodium intake to support healthy blood pressure.

• Hepatitis vaccination reduces the risk of chronic liver disease.

  World Health Organization · 2023 — referenced on the Liver guide

  Vaccination against hepatitis B is a globally recommended, well-established preventive measure against chronic liver disease.

• Adults should aim for 7 or more hours of sleep per night.

  U.S. Centers for Disease Control and Prevention · 2024 — referenced on the Sleep guide

  Public health guidance recommends at least 7 hours of sleep nightly for adults to support health and daytime function.

• Physical activity supports cognitive health across the lifespan.

  World Health Organization · 2023 — referenced on the Brain guide

  Public health guidance links regular physical activity to a reduced risk of cognitive decline.

• Air pollution is a major risk factor for chronic respiratory disease.

  World Health Organization · 2023 — referenced on the Lungs guide

  Global health guidance identifies air pollution as a leading modifiable risk factor for respiratory illness.

• UV radiation is a leading cause of skin cancer and is not blocked by cloud cover alone.

  World Health Organization · 2023 — referenced on the Skin guide

  Public health guidance recommends daily sun protection regardless of weather conditions.

• Blood pressure control is central to slowing chronic kidney disease progression.

  Kidney Disease: Improving Global Outcomes (KDIGO) · 2024 — referenced on the Kidneys guide

  Clinical guidance identifies blood pressure management as a cornerstone of protecting kidney function over time.

• H. pylori infection is a leading cause of peptic ulcer disease.

  World Health Organization · 2023 — referenced on the Stomach guide

  Global health guidance identifies H. pylori as a primary, treatable cause of peptic ulcers.

• Staying active is recommended over prolonged rest for most low back pain.

  World Health Organization · 2023 — referenced on the Spine guide

  Clinical guidance favours graded activity and self-management over prolonged bed rest for non-specific low back pain.

• A specific nutrient combination can slow progression of intermediate age-related macular degeneration.

  National Eye Institute · 2013 — referenced on the Eyes guide

  A large clinical trial found a specific antioxidant and mineral formula reduced progression risk in people with intermediate AMD.

• Unsafe listening practices put over a billion young people at risk of hearing loss.

  World Health Organization · 2023 — referenced on the Ears guide

  Global health guidance highlights recreational noise exposure, including headphone use, as a major preventable cause of hearing loss.

• Higher dietary fibre intake is linked to reduced risk of several chronic diseases.

  World Health Organization · 2023 — referenced on the Large Intestine & Gut Microbiome guide

  Public health guidance recommends higher fibre intake for digestive and broader metabolic health.

• Vaccination is one of the most effective public health interventions for preventing infectious disease.

  World Health Organization · 2024 — referenced on the Immune & Lymphatic System guide

  Global health guidance identifies vaccination as a cornerstone of infectious disease prevention across the lifespan.

• Lifestyle intervention can prevent or delay type 2 diabetes in high-risk individuals.

  World Health Organization · 2023 — referenced on the Pancreas guide

  Public health guidance highlights diet and physical activity as effective tools for preventing type 2 diabetes onset.

• Coeliac disease requires strict, lifelong avoidance of gluten to allow the small intestine to heal.

  World Gastroenterology Organisation · 2023 — referenced on the Small Intestine guide

  Clinical guidance identifies a strict gluten-free diet as the primary treatment for coeliac disease.

• Testosterone levels decline gradually with age in most men.

  Endocrine Society · 2023 — referenced on the Reproductive System guide

  Clinical guidance describes a typical gradual, age-related decline in testosterone and outlines criteria for evaluating low testosterone.

• Pelvic floor muscle training is an effective first-line treatment for stress and urge incontinence.

  National Institute for Health and Care Excellence · 2023 — referenced on the Bladder guide

  Clinical guidance recommends pelvic floor muscle training as first-line treatment before medication or surgery for many types of incontinence.

• Exercise and strength training are core, first-line treatments for knee osteoarthritis.

  National Institute for Health and Care Excellence · 2022 — referenced on the Knees guide

  Clinical guidance recommends exercise and muscle strengthening as core management strategies for knee osteoarthritis, regardless of age or severity.

• Exercise therapy is as effective as surgery for many rotator cuff-related shoulder pain cases.

  British Journal of Sports Medicine · 2022 — referenced on the Shoulders guide

  Clinical research review supports structured exercise therapy as a first-line, often equally effective alternative to surgery for many rotator cuff conditions.

• Early treatment of pattern hair loss improves the chances of maintaining existing hair.

  American Academy of Dermatology · 2023 — referenced on the Scalp & Hair guide

  Clinical guidance recommends starting evidence-based treatment early for the best outcomes in pattern hair loss.

• Regular oral hygiene and dental visits prevent the majority of tooth decay and gum disease.

  World Health Organization · 2023 — referenced on the Mouth & Teeth guide

  Public health guidance identifies consistent oral hygiene and routine dental care as the most effective prevention strategy for oral disease.

• Saline nasal irrigation is an effective, low-risk treatment for nasal congestion and allergic rhinitis.

  American Academy of Allergy, Asthma & Immunology · 2023 — referenced on the Nose & Sinuses guide

  Clinical guidance supports saline nasal rinses as an effective adjunct or first-line treatment for nasal congestion.

• Balance and proprioception training significantly reduces the risk of repeat ankle sprains.

  Journal of Orthopaedic & Sports Physical Therapy · 2021 — referenced on the Feet & Ankles guide

  Clinical rehabilitation guidance recommends structured balance training as a core component of ankle sprain recovery to reduce re-injury risk.

• Degenerative spine findings on imaging are highly prevalent in people without symptoms.

  American Journal of Neuroradiology · 2015 — referenced on the Neck & Cervical Spine guide

  Pooled imaging data showed degenerative changes in a majority of asymptomatic adults, rising steeply with age, supporting cautious interpretation of scan findings.

• Exercise therapy reduces pain and improves function in chronic neck pain.

  Cochrane Database of Systematic Reviews · 2015 — referenced on the Neck & Cervical Spine guide

  Review found that cervico-scapular strengthening exercises produce clinically meaningful improvements in chronic neck pain compared with no treatment.

• Antibiotics provide only modest symptom benefit for most sore throats.

  Cochrane Database of Systematic Reviews · 2021 — referenced on the Throat & Voice guide

  Review found antibiotics shorten symptoms by roughly a day on average, with benefit concentrated in confirmed streptococcal infection, supporting selective rather than routine use.

• Oropharyngeal exercises reduce snoring and mild sleep apnoea severity.

  American Journal of Respiratory and Critical Care Medicine · 2009 — referenced on the Throat & Voice guide

  Randomised trial demonstrated meaningful reductions in apnoea-hypopnoea index and snoring following a structured throat-muscle exercise programme.

• Targeted exercise reduces age-related thoracic hyperkyphosis.

  JAMA Internal Medicine · 2017 — referenced on the Upper Back guide

  Randomised trial found a targeted spine-strengthening programme produced a measurable reduction in kyphosis angle and improved self-image compared with control.

• Thoracic mobility restriction is associated with reduced shoulder range and impingement symptoms.

  Manual Therapy · 2015 — referenced on the Upper Back guide

  Review of biomechanical and clinical studies linking restricted thoracic extension to reduced scapular upward rotation and increased subacromial impingement risk.

• Low back pain is the leading global cause of disability, and most cases are non-specific.

  The Lancet · 2018 — referenced on the Lower Back guide

  Landmark three-paper series establishing low back pain as the top global cause of years lived with disability and calling for a shift away from imaging, opioids and surgery toward active management.

• Guidelines recommend exercise and self-management, and advise against routine imaging and bed rest.

  NICE (National Institute for Health and Care Excellence) · 2020 — referenced on the Lower Back guide

  UK national guideline recommending exercise programmes and psychological approaches as core treatment, while explicitly advising against routine imaging, belts, traction and opioids.

• Cognitive functional therapy produces large improvements in chronic disabling low back pain.

  The Lancet · 2023 — referenced on the Lower Back guide

  Randomised trial showing cognitive functional therapy produced substantially greater reductions in pain-related disability than usual care, sustained at twelve months.

• Total hip replacement is among the most successful surgical interventions available.

  The Lancet · 2007 — referenced on the Hips & Pelvis guide

  Review of outcomes and cost-effectiveness data characterising hip arthroplasty as exceptionally successful, with durable pain relief and function in the great majority of recipients.

• Land-based exercise reduces pain and improves function in hip osteoarthritis.

  Cochrane Database of Systematic Reviews · 2014 — referenced on the Hips & Pelvis guide

  Review found consistent small-to-moderate benefits of structured exercise on hip osteoarthritis pain and physical function, supporting it as first-line management.

• Education plus exercise outperforms corticosteroid injection for gluteal tendinopathy.

  BMJ · 2018 — referenced on the Glutes guide

  Randomised trial found education combined with progressive exercise produced superior outcomes to injection at both eight weeks and one year for gluteal tendinopathy.

• The enlarged human gluteus maximus is an adaptation for endurance running.

  Nature · 2004 — referenced on the Glutes guide

  Comparative anatomy and biomechanics analysis identifying gluteus maximus enlargement among a suite of human traits specifically adapted for endurance running rather than walking.

• Nordic hamstring exercise roughly halves hamstring injury rates.

  American Journal of Sports Medicine · 2011 — referenced on the Hamstrings guide

  Cluster-randomised trial in Danish football found the Nordic hamstring programme substantially reduced both new and recurrent hamstring injuries across a season.

• Lengthened-state rehabilitation shortens return to sport after hamstring injury.

  British Journal of Sports Medicine · 2013 — referenced on the Hamstrings guide

  Trial comparing lengthening-focused exercises with conventional rehabilitation found significantly faster return to full training without increased re-injury.

• Eccentric calf training resolves chronic Achilles tendinopathy in most cases.

  American Journal of Sports Medicine · 1998 — referenced on the Calves guide

  Landmark study in which recreational runners with chronic Achilles tendinosis returned to pre-injury running after a twelve-week eccentric loading programme, establishing loading over rest.

• Soleus carries greater load during running than gastrocnemius.

  British Journal of Sports Medicine · 2019 — referenced on the Calves guide

  Biomechanical analysis showing soleus absorbs and generates substantially higher forces than gastrocnemius during running, supporting targeted bent-knee calf training.

• Grip strength independently predicts mortality and cardiovascular events.

  The Lancet · 2015 — referenced on the Hands & Wrists guide

  Prospective study across 17 countries found grip strength was a stronger predictor of all-cause and cardiovascular mortality than systolic blood pressure.

• Night splinting improves symptoms in carpal tunnel syndrome.

  Cochrane Database of Systematic Reviews · 2012 — referenced on the Hands & Wrists guide

  Review found evidence that wrist splinting, particularly at night, produces short-term symptom improvement compared with no treatment.

• Corticosteroid injection for tennis elbow produces worse one-year outcomes than physiotherapy or wait-and-see.

  The Lancet / BMJ follow-up analyses · 2002 — referenced on the Arms & Elbows guide

  Randomised trial found injection gave superior short-term relief but substantially higher recurrence and worse outcomes at 52 weeks than physiotherapy or watchful waiting.

• Progressive tendon loading is the primary evidence-based treatment for epicondylalgia.

  British Journal of Sports Medicine · 2019 — referenced on the Arms & Elbows guide

  Review synthesising tendon research supports progressive mechanical loading as first-line treatment across tendinopathies, with rest and anti-inflammatory approaches now considered inadequate.

• Hypothyroidism affects a few per cent of adults and is far more common in women and with increasing age.

  The Lancet · 2017 — referenced on the Thyroid guide

  Comprehensive review of prevalence, diagnosis and management, establishing levothyroxine monotherapy as standard care and describing the female predominance and age-related rise in incidence.

• Treating subclinical hypothyroidism in older adults does not improve symptoms.

  New England Journal of Medicine · 2017 — referenced on the Thyroid guide

  Randomised placebo-controlled trial (TRUST) in adults over 65 which normalised TSH with levothyroxine but found no improvement in fatigue or thyroid-related symptom scores.

• Salt iodisation eliminated endemic goitre and iodine-deficiency disorders across much of the world.

  World Health Organization · 2007 — referenced on the Thyroid guide

  WHO guidance documenting the global impact of universal salt iodisation on goitre and iodine-deficiency-related developmental harm, and setting the 150 µg adult intake target.

• There is no substantiating evidence for adrenal fatigue as a medical condition.

  BMC Endocrine Disorders · 2016 — referenced on the Adrenal Glands guide

  Systematic review of 58 studies examining cortisol measures against fatigue, finding no consistent relationship and concluding the concept is not supported by evidence.

• Primary adrenal insufficiency requires lifelong replacement and carries a real risk of fatal adrenal crisis.

  The Lancet · 2021 — referenced on the Adrenal Glands guide

  Review of diagnosis and management, emphasising sick-day dosing, emergency preparedness and the persistent excess mortality associated with adrenal crisis.

• Primary aldosteronism is a common and frequently missed cause of hypertension.

  Annals of Internal Medicine · 2020 — referenced on the Adrenal Glands guide

  Study demonstrating a far higher prevalence of renin-independent aldosterone production across the hypertension spectrum than previously recognised, supporting broader screening.

• Pituitary hormone deficiencies typically develop sequentially and are frequently diagnosed late.

  The Lancet · 2016 — referenced on the Pituitary Gland guide

  Review describing the characteristic order of hormone loss, the non-specific presentation that delays diagnosis, and the requirement to replace cortisol before thyroid hormone.

• Silent pituitary adenomas are present in around a tenth of the population.

  Journal of Clinical Endocrinology & Metabolism · 2011 — referenced on the Pituitary Gland guide

  Guideline synthesising autopsy and imaging prevalence data, concluding that most incidental adenomas are non-functioning and can be managed by surveillance rather than intervention.

• Pituitary dysfunction is common after traumatic brain injury.

  JAMA · 2007 — referenced on the Pituitary Gland guide

  Systematic review finding pituitary hormone deficiency in a substantial minority of survivors of significant head injury, supporting targeted post-injury endocrine assessment.

• Most gallstones are asymptomatic and do not require treatment.

  The Lancet · 2016 — referenced on the Gallbladder guide

  Review of epidemiology and management confirming that around 80% of gallstones remain silent, and that intervention is generally reserved for symptomatic or complicated disease.

• Rapid weight loss substantially increases gallstone formation.

  American Journal of Gastroenterology · 1991 — referenced on the Gallbladder guide

  Study documenting high rates of new gallstone formation during very low calorie dieting and establishing the role of prophylactic ursodeoxycholic acid during rapid weight reduction.

• Early laparoscopic cholecystectomy is preferable to delayed surgery for acute cholecystitis.

  Cochrane Database of Systematic Reviews · 2013 — referenced on the Gallbladder guide

  Meta-analysis finding no increase in complications with early surgery and a shorter total hospital stay, supporting operating during the index admission.

• Barrett's oesophagus develops after chronic acid exposure and carries an increased but modest risk of adenocarcinoma.

  New England Journal of Medicine · 2014 — referenced on the Oesophagus guide

  Review quantifying progression rates from non-dysplastic Barrett's to cancer as well below historical estimates, and setting out risk-stratified surveillance and ablation strategies.

• Weight loss and meal timing reduce reflux symptoms more reliably than specific food elimination.

  Clinical Gastroenterology and Hepatology · 2016 — referenced on the Oesophagus guide

  Systematic review finding consistent benefit from weight reduction and head-of-bed elevation, with limited evidence supporting routine avoidance of commonly blamed trigger foods.

• Swallowing therapy after stroke reduces aspiration and improves outcomes.

  Stroke · 2005 — referenced on the Oesophagus guide

  Cohort study establishing the high incidence of post-stroke swallowing impairment and its direct link to pneumonia, underpinning routine early swallow screening.

• People without splenic function face a lifelong increased risk of overwhelming bacterial infection.

  The Lancet · 2011 — referenced on the Spleen guide

  Review establishing the risk profile of asplenia and the evidence base for vaccination, antibiotic prophylaxis and patient education as the core preventive strategy.

• Vaccination and prompt treatment of fever are the mainstays of post-splenectomy care.

  British Journal of Haematology · 2011 — referenced on the Spleen guide

  National guidance specifying required vaccinations, the role of prophylactic antibiotics, alert cards and standby antibiotic provision for febrile illness.

• Contact sport should be avoided for at least three weeks after glandular fever due to splenic rupture risk.

  Clinical Journal of Sport Medicine · 2014 — referenced on the Spleen guide

  Review of reported rupture cases showing the great majority occur within the first three weeks of illness, informing standard return-to-play restrictions.

• Iron deficiency is the commonest nutritional deficiency worldwide and requires investigation of its cause.

  The Lancet · 2021 — referenced on the Blood guide

  Review covering global prevalence, diagnosis using ferritin with awareness of inflammation, and the requirement to identify a bleeding source in men and postmenopausal women.

• Alternate-day iron dosing improves absorption compared with daily dosing.

  The Lancet Haematology · 2017 — referenced on the Blood guide

  Trial demonstrating that a dose of iron raises hepcidin and blocks absorption of subsequent doses, so alternate-day single doses deliver more absorbed iron than divided daily regimens.

• Age-related clonal mutations in blood stem cells increase cardiovascular risk.

  New England Journal of Medicine · 2017 — referenced on the Blood guide

  Analysis linking clonal haematopoiesis of indeterminate potential to a substantially increased risk of coronary heart disease independent of conventional risk factors.

• Gene editing can effectively treat sickle cell disease and beta thalassaemia.

  New England Journal of Medicine · 2021 — referenced on the Blood guide

  First-in-human results showing that editing to reactivate fetal haemoglobin eliminated vaso-occlusive crises and transfusion dependence, leading to subsequent regulatory approval.

• A Mediterranean dietary pattern reduces major cardiovascular events.

  New England Journal of Medicine · 2018 — referenced on the Blood Vessels guide

  Randomised trial (PREDIMED) in which a Mediterranean diet supplemented with olive oil or nuts reduced the incidence of major cardiovascular events compared with a reduced-fat control diet.

• Reducing inflammation lowers cardiovascular events independently of cholesterol.

  New England Journal of Medicine · 2017 — referenced on the Blood Vessels guide

  Trial (CANTOS) showing that targeting interleukin-1β reduced recurrent cardiovascular events without altering lipid levels, establishing inflammation as an independent treatable target.

• Exercise improves endothelial function through increased shear stress.

  Circulation · 2003 — referenced on the Blood Vessels guide

  Review of mechanistic and clinical studies establishing shear-stress-mediated nitric oxide production as the pathway by which exercise improves vascular function, with benefits reversing on detraining.

• Supervised exercise therapy substantially improves walking distance in peripheral arterial disease.

  Cochrane Database of Systematic Reviews · 2017 — referenced on the Blood Vessels guide

  Meta-analysis demonstrating large improvements in maximal walking distance with supervised exercise, comparable in many patients to revascularisation.

• High-intensity resistance and impact training is safe and effective for postmenopausal women with low bone mass.

  Journal of Bone and Mineral Research · 2018 — referenced on the Bones guide

  The LIFTMOR randomised trial demonstrating improvements in lumbar spine and femoral neck bone density and functional performance with supervised heavy loading, with a very low adverse event rate.

• Osteoporosis treatment substantially reduces fracture risk but remains widely under-prescribed after fragility fracture.

  The Lancet · 2019 — referenced on the Bones guide

  Review quantifying fracture risk reduction with available therapies and documenting the large treatment gap, with most patients receiving no bone-directed therapy after a fragility fracture.

• Calcium supplementation alone has limited effect on fracture risk.

  BMJ · 2015 — referenced on the Bones guide

  Systematic review finding that increasing calcium intake from diet or supplements produced small, non-progressive increases in bone density unlikely to translate into meaningful fracture reduction in replete populations.

• Bone functions as an endocrine organ influencing metabolism.

  Nature Reviews Endocrinology · 2012 — referenced on the Bones guide

  Review establishing bone-derived hormones including osteocalcin and FGF23 as regulators of phosphate handling, insulin sensitivity and energy metabolism.

• Exercise therapy reduces pain and improves function in knee osteoarthritis.

  Cochrane Database of Systematic Reviews · 2015 — referenced on the Joints guide

  Meta-analysis of 54 trials finding moderate-quality evidence for reduced pain and improved physical function with land-based exercise, with benefits declining after programmes end.

• Glucosamine and chondroitin do not provide meaningful pain relief in knee osteoarthritis.

  New England Journal of Medicine · 2006 — referenced on the Joints guide

  The GAIT randomised trial found no significant benefit over placebo for the overall study population, substantially undermining the supplements' marketed claims.

• Recreational running is not associated with increased knee osteoarthritis risk.

  Journal of Orthopaedic & Sports Physical Therapy · 2017 — referenced on the Joints guide

  Systematic review and meta-analysis finding lower osteoarthritis prevalence among recreational runners than sedentary controls, with elevated rates only at elite competitive volumes.

• Arthroscopic surgery for degenerative meniscal tears offers no benefit over sham surgery.

  New England Journal of Medicine · 2013 — referenced on the Joints guide

  Randomised sham-controlled trial finding no significant difference in outcomes at 12 months, a landmark result that changed guidelines on degenerative knee surgery.

• Fascia is densely innervated and is a plausible source of musculoskeletal pain.

  Journal of Anatomy · 2012 — referenced on the Fascia & Connective Tissue guide

  Anatomical review documenting the dense sensory innervation of the thoracolumbar fascia and its capacity to transmit force between the upper and lower limbs, supporting its role as a pain generator.

• Foam rolling improves range of motion without reducing muscle performance, through non-mechanical mechanisms.

  Frontiers in Physiology · 2019 — referenced on the Fascia & Connective Tissue guide

  Systematic review confirming consistent short-term range gains without force decrement, and concluding that neurophysiological rather than mechanical mechanisms best explain the findings.

• High-load strength training outperforms stretching for plantar fasciopathy.

  Scandinavian Journal of Medicine & Science in Sports · 2015 — referenced on the Fascia & Connective Tissue guide

  Randomised trial showing faster improvement in function with high-load heel raises compared with plantar fascia stretching, establishing loading as the preferred approach.

• Gelatin with vitamin C before exercise increases collagen synthesis.

  American Journal of Clinical Nutrition · 2017 — referenced on the Fascia & Connective Tissue guide

  Controlled study demonstrating increased blood markers of collagen synthesis when gelatin with vitamin C was consumed approximately an hour before loading exercise.

• Resistance training produces large strength gains even in very old adults.

  JAMA · 1990 — referenced on the Quadriceps & Thighs guide

  Landmark trial in which frail nonagenarians achieved large quadriceps strength gains and improved gait and stair-climbing ability over eight weeks of progressive resistance training.

• Criterion-based return-to-sport testing reduces re-injury after ACL reconstruction.

  British Journal of Sports Medicine · 2016 — referenced on the Quadriceps & Thighs guide

  Prospective cohort demonstrating that meeting strength symmetry and hop test criteria before return to sport markedly reduced second ACL injury, with quadriceps strength deficit a key predictor.

• Deep squatting does not increase knee injury risk in healthy individuals.

  Sports Medicine · 2013 — referenced on the Quadriceps & Thighs guide

  Biomechanical review concluding that full-depth squatting with proper technique does not increase injury risk in healthy knees, and that restricting depth shifts load elsewhere.

• Joint swelling reflexively inhibits quadriceps activation after knee injury.

  Journal of Athletic Training · 2010 — referenced on the Quadriceps & Thighs guide

  Review establishing that reflex inhibition, rather than atrophy alone, accounts for much post-injury quadriceps weakness, and that activation must be addressed before strengthening.

• Eccentric calf loading resolves chronic Achilles tendinopathy in most cases.

  American Journal of Sports Medicine · 1998 — referenced on the Achilles Tendon & Ankles guide

  Landmark study in which recreational runners with chronic Achilles tendinosis returned to pre-injury running after a twelve-week eccentric loading programme, establishing loading over rest.

• Heavy slow resistance training is as effective as eccentric training for Achilles tendinopathy.

  Scandinavian Journal of Medicine & Science in Sports · 2015 — referenced on the Achilles Tendon & Ankles guide

  Comparative trial finding equivalent clinical outcomes between heavy slow resistance and eccentric protocols, with better patient satisfaction and adherence in the heavy slow resistance group.

• Balance and proprioceptive training reduces recurrent ankle sprain.

  Cochrane Database of Systematic Reviews · 2011 — referenced on the Achilles Tendon & Ankles guide

  Meta-analysis showing that neuromuscular and proprioceptive training programmes after ankle sprain significantly reduce the rate of recurrent sprain.

• Platelet-rich plasma injection does not improve outcomes in Achilles tendinopathy.

  JAMA · 2021 — referenced on the Achilles Tendon & Ankles guide

  Randomised placebo-controlled trial finding no significant difference in symptoms or function between PRP and sham injection at six months, despite widespread clinical use.

• Targeted core stability training is not superior to general exercise for low back pain.

  British Journal of Sports Medicine · 2016 — referenced on the Core & Abdominal Muscles guide

  Systematic review and meta-analysis finding no clinically important difference in pain or function between specific core stabilisation programmes and general exercise, challenging the specific-activation model.

• Trunk muscles activate anticipatorily before limb movement.

  Physical Therapy · 1997 — referenced on the Core & Abdominal Muscles guide

  Foundational EMG study demonstrating that transversus abdominis activates before limb movement in healthy individuals and with delayed timing in people with low back pain.

• Most postpartum abdominal separation narrows substantially within the first year.

  British Journal of Sports Medicine · 2016 — referenced on the Core & Abdominal Muscles guide

  Prospective cohort documenting high prevalence at delivery with substantial spontaneous narrowing by twelve months, and no clear relationship between separation width and lumbopelvic pain.

• Abdominal exercise does not preferentially reduce abdominal fat.

  Journal of Strength and Conditioning Research · 2011 — referenced on the Core & Abdominal Muscles guide

  Controlled trial in which six weeks of abdominal exercise improved muscular endurance but produced no change in abdominal fat or body composition compared with control.

• Bench press angle alters the relative activation of pectoralis major portions.

  Journal of Strength and Conditioning Research · 2020 — referenced on the Chest & Pectorals guide

  EMG comparison across bench inclinations demonstrating differential activation of clavicular and sternal portions of pectoralis major, supporting varied press angles in programming.

• Scapular control, particularly serratus anterior function, is central to shoulder impingement.

  Journal of the American Academy of Orthopaedic Surgeons · 2012 — referenced on the Chest & Pectorals guide

  Review establishing altered scapular motion and serratus anterior deficiency as contributors to subacromial narrowing and shoulder pain, supporting scapular-focused rehabilitation.

• Pectoralis major rupture is strongly associated with bench pressing and does better with surgical repair.

  American Journal of Sports Medicine · 2010 — referenced on the Chest & Pectorals guide

  Systematic review identifying bench press as the dominant mechanism and reporting superior strength and functional outcomes with early surgical repair for complete ruptures.

• Postural measures such as rounded shoulders correlate poorly with musculoskeletal pain.

  Physical Therapy · 2016 — referenced on the Chest & Pectorals guide

  Longitudinal study finding no consistent relationship between measured postural subgroups and subsequent persistent pain, part of a broader literature questioning posture-based explanations.

• Inspiratory muscle strength training lowers systolic blood pressure.

  Journal of the American Heart Association · 2021 — referenced on the Diaphragm guide

  Randomised trial in midlife and older adults finding a reduction in systolic blood pressure after six weeks of high-resistance inspiratory muscle training, with effect sizes comparable to some single antihypertensive agents.

• Breathing exercises improve asthma-related quality of life without altering lung function.

  Cochrane Database of Systematic Reviews · 2020 — referenced on the Diaphragm guide

  Review finding improvements in quality of life and symptoms with breathing retraining, with no change in objective lung function, supporting an adjunctive rather than substitutive role.

• Mechanical ventilation causes diaphragm weakness that impairs weaning.

  New England Journal of Medicine · 2008 — referenced on the Diaphragm guide

  Study demonstrating marked diaphragmatic muscle fibre atrophy after relatively short periods of mechanical ventilation, establishing ventilator-induced diaphragm dysfunction as a clinical entity.

• Pulmonary rehabilitation improves exercise capacity and quality of life in COPD.

  Cochrane Database of Systematic Reviews · 2015 — referenced on the Diaphragm guide

  Meta-analysis demonstrating clinically important improvements in exercise capacity, breathlessness and quality of life, establishing pulmonary rehabilitation as a cornerstone of COPD management.

• Diabetes is the leading cause of peripheral neuropathy and glucose control is the main protective factor.

  Diabetes Care · 2017 — referenced on the Nerves & Peripheral Nervous System guide

  Consensus statement establishing glycaemic control as the primary preventive intervention, describing the distal symmetrical presentation, and setting out the evidence base for symptomatic pain management.

• Excessive vitamin B6 intake causes sensory neuropathy.

  New England Journal of Medicine · 1983 — referenced on the Nerves & Peripheral Nervous System guide

  Case series demonstrating severe sensory neuropathy in individuals taking high-dose pyridoxine, establishing that an essential vitamin can be neurotoxic in excess.

• Surgery for sciatica accelerates recovery but does not clearly improve long-term outcomes.

  Cochrane Database of Systematic Reviews · 2023 — referenced on the Nerves & Peripheral Nervous System guide

  Review finding faster early symptom relief with surgery but little difference between surgical and conservative groups at one to two years for most patients.

• Exercise can slow progression of diabetic peripheral neuropathy.

  Journal of Diabetes and its Complications · 2012 — referenced on the Nerves & Peripheral Nervous System guide

  Intervention study reporting increased intraepidermal nerve fibre branching and reduced pain following a supervised diet and exercise programme, supporting exercise as disease-modifying rather than purely symptomatic.

• Vagal signalling reduces inflammatory cytokine release.

  Nature Reviews Endocrinology · 2012 — referenced on the Vagus Nerve guide

  Review documenting the cholinergic anti-inflammatory pathway, in which vagal efferent activity suppresses macrophage cytokine production, providing the rationale for stimulation trials in inflammatory disease.

• Slow breathing increases heart rate variability through vagal pathways.

  Frontiers in Human Neuroscience · 2018 — referenced on the Vagus Nerve guide

  Systematic review finding consistent increases in heart rate variability and parasympathetic indices with slow breathing, alongside reductions in anxiety and arousal measures.

• Implanted vagus nerve stimulation reduces seizure frequency in drug-resistant epilepsy.

  Neurology · 1998 — referenced on the Vagus Nerve guide

  Randomised controlled trial demonstrating significant seizure reduction with high-stimulation vagus nerve stimulation, leading to regulatory approval for drug-resistant epilepsy.

• Reduced heart rate variability is associated with worse cardiovascular outcomes.

  Circulation · 1994 — referenced on the Vagus Nerve guide

  Cohort study establishing an association between low heart rate variability and increased all-cause mortality, supporting HRV as a prognostic marker while not establishing it as a treatment target.

• Active monitoring, surgery and radiotherapy produce similar prostate cancer mortality at 15 years for localised disease.

  New England Journal of Medicine · 2023 — referenced on the Prostate guide

  The ProtecT randomised trial found very low and statistically similar prostate cancer mortality across all three arms at 15 years, with treatments differing mainly in urinary and sexual side effects.

• MRI before biopsy reduces unnecessary biopsies and overdiagnosis of insignificant cancer.

  New England Journal of Medicine · 2018 — referenced on the Prostate guide

  The PRECISION trial showed MRI-targeted biopsy detected more clinically significant cancers and fewer insignificant ones than standard systematic biopsy, while allowing some men to avoid biopsy entirely.

• Saw palmetto does not improve urinary symptoms of prostate enlargement.

  JAMA · 2011 — referenced on the Prostate guide

  The CAMUS randomised trial found no improvement over placebo in urinary symptom scores even at doses up to three times the standard, contradicting earlier smaller studies.

• Vitamin E supplementation increases prostate cancer incidence.

  JAMA · 2011 — referenced on the Prostate guide

  The SELECT trial found a statistically significant increase in prostate cancer incidence among men taking vitamin E, with no preventive benefit from selenium.

• Breast-conserving surgery with radiotherapy gives equivalent survival to mastectomy.

  New England Journal of Medicine · 2002 — referenced on the Breasts guide

  Long-term follow-up of the NSABP B-06 trial demonstrating no survival difference between mastectomy and lumpectomy with radiotherapy, overturning the rationale for radical surgery.

• Alcohol increases breast cancer risk in a dose-dependent manner from low intakes.

  JAMA · 2011 — referenced on the Breasts guide

  Large prospective cohort study finding a modest but consistent increase in breast cancer risk with alcohol intake, evident even at low levels of consumption.

• Formal breast self-examination does not reduce breast cancer mortality.

  Cochrane Database of Systematic Reviews · 2003 — referenced on the Breasts guide

  Review of large randomised trials finding no mortality reduction from taught breast self-examination, with an increase in benign biopsies, informing the shift to breast awareness.

• Physical activity is associated with reduced breast cancer risk and better outcomes after diagnosis.

  JAMA · 2005 — referenced on the Breasts guide

  Prospective cohort study demonstrating substantially lower breast cancer mortality among women who were physically active after diagnosis, with a dose-response relationship.

• Progressive resistance training is safe for women at risk of lymphoedema.

  New England Journal of Medicine · 2009 — referenced on the Breasts guide

  Randomised trial showing slowly progressive weight lifting did not increase lymphoedema and reduced symptom exacerbations, reversing long-standing advice to avoid arm loading.