Sources
Every claim on these pages points to a source below (S1, S2…). All copy is written in our own words, and nothing is quoted from these sources.
How to read this list
Reliability
- High: a systematic review, meta-analysis or consensus statement.
- Medium: a narrative review, position stand, professional body, or national health service page.
- Single study: one trial or survey. Useful, but weigh it lightly (between medium and low).
- Low: an expert blog.
Warm-ups, stretching and mobility
| ID | Source | Year | Reliability | Used for |
|---|---|---|---|---|
| S1 | Boullosa D, Gil-Calvo M, … Pyne DB. International expert consensus on warm-up protocols for athletes: a Delphi study. Int J Sports Physiol Perform 21(9):982–995. doi.org/10.1123/ijspp.2025-0647 · ECU record | 2026 | High (expert consensus) | The 3 warm-up layers (general, specific, conditioning); tailoring warm-ups; no support for protection from injury on the day, with a possible long-term benefit |
| S2 | Fradkin AJ, Zazryn TR, Smoliga JM. Effects of warming-up on physical performance: a systematic review with meta-analysis. J Strength Cond Res 24(1):140–148. PubMed 19996770 | 2010 | High (older, mostly non-lifting outcomes) | Warming up improved performance in most of the outcomes measured; little evidence of harm |
| S3 | McGowan CJ, Pyne DB, Thompson KG, Rattray B. Warm-up strategies for sport and exercise: mechanisms and applications. Sports Med 45(11):1523–1546. PubMed 26400696 | 2015 | Medium (narrative review) | How warm-ups work (temperature, metabolic, neural, psychological); warm-up practice is largely trial and error |
| S4 | Ribeiro B, Pereira A, Neves P, Marinho D, Marques M, Neiva HP. The effect of warm-up in resistance training and strength performance: a systematic review. Motricidade 17. doi.org/10.6063/motricidade.21143 · journal page | 2021 | High (but only 11 small studies, mixed results) | General + specific warm-up: results mixed. A specific warm-up at loads close to the maximum seemed to help strength and reps |
| S5 | Ribeiro B, Pereira A, Neves PP, et al. The role of specific warm-up during bench press and squat exercises: a novel approach. Int J Environ Res Public Health 17(18):6882. PMC7558980 | 2020 | Single study (40 trained men) | Squat: a warm-up set nearer the work weight beat a light set only. Bench: two warm-up sets (light, then heavier) did best. A few light reps alone weren't enough |
| S6 | Combination of general and specific warm-ups improves leg-press one repetition maximum compared with specific warm-up in trained individuals. J Strength Cond Res (2011). PubMed 21544000 | 2011 | Single study (13 trained men) | A general warm-up (20 min easy cycling) before specific sets raised leg-press 1RM vs specific sets alone |
| S7 | Behm DG, Blazevich AJ, Kay AD, McHugh M. Acute effects of muscle stretching on physical performance, range of motion, and injury incidence in healthy active individuals: a systematic review. Appl Physiol Nutr Metab 41(1):1–11. doi.org/10.1139/apnm-2015-0235 | 2016 | High | Static holds of 60 s or more cost more performance than shorter ones. With dynamic activity afterwards, there was no clear effect. Stretching had no clear effect on injuries. Range-of-motion gains from one session usually last under 30 min |
| S8 | Kay AD, Blazevich AJ. Effect of acute static stretch on maximal muscle performance: a systematic review. Med Sci Sports Exerc 44(1):154–164. ECU record | 2012 | High | Static holds under 30 s showed no detrimental effect, and 30–45 s holds no significant effect. Losses become likely at 60 s or more |
| S9 | Opplert J, Babault N. Acute effects of dynamic stretching on muscle flexibility and performance: an analysis of the current literature. Sports Med 48(2):299–325. PubMed 29063454 | 2018 | Medium (literature analysis) | Dynamic stretching improves range of motion and often later force and power |
| S10 | Blazevich AJ, Babault N. Post-activation potentiation versus post-activation performance enhancement in humans. Front Physiol 10:1359. frontiersin.org | 2019 | Medium (narrative review) | Why a heavier warm-up single might help (performance enhancement after hard contractions). The mechanism is mostly temperature and activation, and the effect varies |
| S11 | Wiewelhove T, Döweling A, Schneider C, et al. A meta-analysis of the effects of foam rolling on performance and recovery. Front Physiol 10:376. frontiersin.org (CC BY) | 2019 | High | Rolling before training: small flexibility gain, negligible effect on strength. Overall effects are small |
| S12 | Afonso J, Ramirez-Campillo R, Moscão J, et al. Strength training versus stretching for improving range of motion: a systematic review and meta-analysis. Healthcare 9(4):427. doi.org/10.3390/healthcare9040427 | 2021 | High (heterogeneous trials) | Strength training and stretching gave similar range-of-motion gains |
| S13 | Afonso J, Clemente FM, Nakamura FY, et al. The effectiveness of post-exercise stretching in short-term and delayed recovery of strength, range of motion and delayed onset muscle soreness: a systematic review and meta-analysis of randomized controlled trials. Front Physiol 12:677581. doi.org/10.3389/fphys.2021.677581 | 2021 | High (very low certainty evidence) | Stretching after training didn't help strength recovery or soreness vs rest |
| S14 | Lauersen JB, Bertelsen DM, Andersen LB. The effectiveness of exercise interventions to prevent sports injuries: a systematic review and meta-analysis of randomised controlled trials. Br J Sports Med 48(11):871–877. doi.org/10.1136/bjsports-2013-092538 | 2014 | High (pre-2015 classic, mostly team sports and military) | Strength training programmes reduced sports injuries, and stretching programmes didn't |
| S15 | Fuglsang EI, Telling AS, Sørensen H. Effect of ankle mobility and segment ratios on trunk lean in the barbell back squat. J Strength Cond Res 31(11):3024–3033. doi 10.1519/JSC.0000000000001872 · record | 2017 | Single study (11 men) | Lifters used less ankle bend at parallel than they had available. Ankle range related moderately to trunk lean |
| S16 | Fry AC, Smith JC, Schilling BK. Effect of knee position on hip and knee torques during the barbell squat. J Strength Cond Res 17(4):629–633. UNLV record | 2003 | Single study (older lab study) | Blocking forward knee travel shifted load toward the hips and trunk |
| S17 | Human Performance Resources by CHAMP (Uniformed Services University). One-rep max for strength (summarises the NSCA 1RM testing protocol). hprc-online.org | 2022 | Medium (professional protocol via a government-funded site) | The shape of the warm-up ramp: light 5–10 reps, then heavier 3–5, then near-max 2–3, with rests growing from about 1 to 2–4 min |
Pain, load and niggles
| ID | Source | Year | Reliability | Used for |
|---|---|---|---|---|
| S18 | Soligard T, Schwellnus M, Alonso JM, et al. How much is too much? (Part 1) International Olympic Committee consensus statement on load in sport and risk of injury. Br J Sports Med 50(17):1030–1041. bjsm.bmj.com | 2016 | High (consensus) | Poor load management, including rapid load changes and psychological stress, is a major injury risk factor |
| S19 | Silbernagel KG, Thomeé R, Eriksson BI, Karlsson J. Continued sports activity, using a pain-monitoring model, during rehabilitation in patients with Achilles tendinopathy: a randomized controlled study. Am J Sports Med 35(6):897–906. doi 10.1177/0363546506298279 · review of the trial | 2007 | Single study (RCT, 38 patients, specific condition) | The pain-monitoring idea: pain up to about 5/10 during activity, settled by next morning, not building week to week. Presented as a way to think about pain, not as a treatment |
| S20 | Smith BE, Hendrick P, Smith TO, et al. Should exercises be painful in the management of chronic musculoskeletal pain? A systematic review and meta-analysis. Br J Sports Med 51(23):1679–1687. bjsm.bmj.com | 2017 | High | Some pain during exercise didn't make outcomes worse, with a small short-term benefit |
| S21 | Hainline B, Derman W, Vernec A, et al. International Olympic Committee consensus statement on pain management in elite athletes. Br J Sports Med 51:1245–1258. doi 10.1136/bjsports-2017-097884 · Swansea repository | 2017 | High (consensus) | Pain in athletes has physical, mechanical and psychosocial sides |
| S22 | Raja SN, Carr DB, Cohen M, et al. The revised International Association for the Study of Pain definition of pain: concepts, challenges, and compromises. Pain 161(9):1976–1982. doi 10.1097/j.pain.0000000000001939 · PMC7680716 | 2020 | High (international definition) | Pain is an experience, not a direct readout of tissue damage |
| S23 | Baraki A (Barbell Medicine). The 3 biggest mistakes you're making with lifting rehab (updated 16 May 2025). barbellmedicine.com | 2025 | Low (expert blog by a physician) | Cut load more than you think. Signs the load is too high (pain rising set to set, worse over 24–48 h, not back to baseline). Build back gradually |
| S24 | Brinjikji W, Luetmer PH, Comstock B, et al. Systematic literature review of imaging features of spinal degeneration in asymptomatic populations. AJNR 36(4):811–816. ajnr.org | 2015 | High | Disc "wear" on scans is common in people with no back pain and rises with age |
| S25 | Saraceni N, Kent P, Ng L, Campbell A, Straker L, O'Sullivan P. To flex or not to flex? Is there a relationship between lumbar spine flexion during lifting and low back pain? A systematic review with meta-analysis. J Orthop Sports Phys Ther 50(3):121–130. review summary | 2020 | High (but low-quality studies with light everyday loads, not barbell lifting) | No clear link found between spine bending when lifting and back pain |
| S26 | Hartvigsen J, Hancock MJ, Kongsted A, et al. What low back pain is and why we need to pay attention. Lancet 391(10137):2356–2367. doi 10.1016/S0140-6736(18)30480-X · Warwick repository | 2018 | High (Lancet series review) | Most new back pain recovers quickly, but recurrence is common. A specific cause is rarely found |
Red flags and when to get help
| ID | Source | Year | Reliability | Used for |
|---|---|---|---|---|
| S27 | NHS. Back pain (reviewed 5 Mar 2026). nhs.uk | 2026 | Medium (national health service) | GP, urgent and 999 triggers for back pain; stay active |
| S28 | NHS. Sprains and strains (reviewed 23 Apr 2024). nhs.uk | 2024 | Medium | Urgent and 999 triggers after an injury. Most improve within about 2 weeks |
| S29 | NHS. Headaches (reviewed 17 Apr 2024). nhs.uk | 2024 | Medium | Sudden severe headache → 999. Headache triggered by exercise or straining → urgent |
| S30 | NHS. Chest pain (reviewed 8 Aug 2023). nhs.uk | 2023 | Medium | Chest pain triggers for 999 |
| S31 | NHS. Fainting (reviewed 17 Aug 2026). nhs.uk | 2026 | Medium | Fainting while exercising → 999 |
| S32 | NHS. Hernia (reviewed 19 May 2026). nhs.uk | 2026 | Medium | Signs of a hernia; pain, sickness or bloating → urgent |
| S33 | NHS. Knee pain (reviewed 21 Dec 2023). nhs.uk | 2023 | Medium | Locking, giving way, painful clicking, swelling, can't bear weight → urgent |
| S34 | NHS. Shoulder pain (reviewed 22 May 2023). nhs.uk | 2023 | Medium | Not improving after 2 weeks → GP; pain after a fall, numbness, pins and needles → urgent |
| S35 | NHS. Hip pain (reviewed 20 Nov 2025). nhs.uk | 2025 | Medium | Severe pain after a fall or can't bear weight → 999. Stiffness over 30 min after waking, or no better after 2 weeks → GP |
| S36 | NHS. Pins and needles (reviewed 4 Jan 2024). nhs.uk | 2024 | Medium | Constant or recurring pins and needles → GP |
| S37 | MedlinePlus (US National Library of Medicine). Rhabdomyolysis (reviewed 2 Sep 2025). medlineplus.gov | 2025 | Medium | Dark or cola-coloured urine, muscle pain, weakness → contact a provider |
| S38 | American Academy of Orthopaedic Surgeons, OrthoInfo. Biceps tendon tear at the elbow (no review date shown). orthoinfo.org | n.d. | Medium (professional body) | A pop, bruising, the muscle bunching up, weakness. Repair is ideally done within 2–3 weeks, so get seen quickly |
| S39 | American Physical Therapy Association, ChoosePT. Physical therapy guide to low back pain (expert review 11 Jun 2023). choosept.com | 2023 | Medium (national physio body) | Stay active. Scans usually aren't needed. Emergency signs |
| S40 | Finucane LM, Downie A, Mercer C, et al. International framework for red flags for potential serious spinal pathologies. J Orthop Sports Phys Ther 50(7):350–372. doi 10.2519/jospt.2020.9971 · IFOMPT PDF | 2020 | High (international consensus framework) | A single red flag rarely proves anything, which is why a professional should assess |
| S41 | Bernama. MAHPC extends transition period for allied health practitioners to 31 Dec 2026 (24 Jun 2025). bernama.com | 2025 | Medium (national news agency reporting the regulator) | In Malaysia, allied health practitioners must register with the Malaysian Allied Health Professions Council and hold a practising certificate |
Lifting aches: how common, and where
| ID | Source | Year | Reliability | Used for |
|---|---|---|---|---|
| S42 | Berglund L, Lopes AD, Tung MJ-Y, Lantz GA. Injuries in weightlifting and powerlifting: an updated systematic review. BMJ Open Sport Exerc Med 10(4):e001884. doi 10.1136/bmjsem-2023-001884 · PubMed 39650568 | 2024 | High | Powerlifting: 1.0–4.4 injuries per 1,000 training hours. Most common sites: lower back/pelvis, shoulder, elbow/upper arm. Pelvic floor problems (mostly leaking urine) far more common in women (50% vs 9.3%) |
| S43 | Aasa U, Svartholm I, Andersson F, Berglund L. Injuries among weightlifters and powerlifters: a systematic review. Br J Sports Med 51(4):211–219. bjsm.bmj.com | 2017 | High (mostly low-quality studies) | Injury risk similar to other non-contact strength sports, lower than contact sports. Spine, shoulder and knee most common |
| S44 | Keogh JWL, Winwood PW. The epidemiology of injuries across the weight-training sports. Sports Med 47(3):479–501. doi 10.1007/s40279-016-0575-0 · Bond record | 2017 | High (retrospective, self-reported data) | Shoulder, lower back, knee, elbow and wrist/hand most affected. Strains, tendon problems and sprains most common. Rates low vs team sports |
| S45 | Strömbäck E, Aasa U, Gilenstam K, Berglund L. Prevalence and consequences of injuries in powerlifting: a cross-sectional study. Orthop J Sports Med 6(5):2325967118771016. PMC5954586 | 2018 | Single study (104 Swedish sub-elite classic lifters, survey) | Using a broad "pain that affects training" definition: 70% currently affected. 80.8% changed their training; 15.7% stopped all three lifts. Lower back linked to deadlift onset, shoulder to bench onset |
| S46 | Bengtsson V, Berglund L, Aasa U. Narrative review of injuries in powerlifting with special reference to their association to the squat, bench press and deadlift. BMJ Open Sport Exerc Med 4:e000382. PMC6059276 | 2018 | Medium (narrative review) | The evidence linking the three lifts to specific injuries is limited |
| S47 | Siewe J, Rudat J, Röllinghoff M, et al. Injuries and overuse syndromes in powerlifting. Int J Sports Med 32(9):703–711. doi 10.1055/s-0031-1277207 | 2011 | Single study (245 lifters, questionnaire) | 43% reported problems during routine training. Shoulder, lower back and knee most often injured. Rate low vs other sports |
Recovery
| ID | Source | Year | Reliability | Used for |
|---|---|---|---|---|
| S48 | Watson NF, Badr MS, Belenky G, et al. Recommended amount of sleep for a healthy adult: a joint consensus statement of the AASM and Sleep Research Society. Sleep 38(6):843–844. PMC4434546 | 2015 | High (consensus) | At least 7 hours regularly for adults. Timing and regularity matter too |
| S49 | Walsh NP, Halson SL, Sargent C, et al. Sleep and the athlete: narrative review and 2021 expert consensus recommendations. Br J Sports Med 55(7):356–368. bjsm.bmj.com | 2021 | High (consensus) | Short sleep is common in athletes. Needs are individual, and one figure doesn't fit everyone |
| S50 | Knowles OE, Drinkwater EJ, Urwin CS, Lamon S, Aisbett B. Inadequate sleep and muscle strength: implications for resistance training. J Sci Med Sport 21(9):959–968. PubMed 29422383 | 2018 | High (studies weak to moderate quality) | Several short nights reduced force in multi-joint lifts but not single-joint ones |
| S51 | Craven J, McCartney D, Desbrow B, et al. Effects of acute sleep loss on physical performance: a systematic and meta-analytical review. Sports Med 52(11):2669–2690. PubMed 35708888 | 2022 | High | Short-term sleep loss hurts performance across exercise types. Train earlier in the day if you can |
| S52 | Morton RW, Murphy KT, McKellar SR, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults. Br J Sports Med 52(6):376–384. PMC5867436 | 2018 | High | Gains level off at about 1.6 g/kg/day. The uncertainty around that figure runs up to about 2.2 g/kg, a figure S55 also uses |
| S53 | Jäger R, Kerksick CM, Campbell BI, et al. International Society of Sports Nutrition position stand: protein and exercise. J Int Soc Sports Nutr 14:20. PMC5477153 | 2017 | Medium (position stand) | 1.4–2.0 g/kg/day for most exercising people. Higher intakes may help keep muscle while dieting |
| S54 | Thomas DT, Erdman KA, Burke LM. Nutrition and athletic performance (joint position: Academy of Nutrition and Dietetics, Dietitians of Canada, American College of Sports Medicine). J Acad Nutr Diet 116(3):501–528; also Med Sci Sports Exerc 48(3):543–568. ACU record | 2016 | High (joint position) | Regular spacing of protein through the day |
| S55 | Schoenfeld BJ, Aragon AA. How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution. J Int Soc Sports Nutr 15:10. PMC5828430 | 2018 | Medium (narrative review) | About 0.4 g/kg per meal over at least 4 meals |
| S56 | Bell L, Strafford BW, Coleman M, Androulakis Korakakis P, Nolan D. Integrating deloading into strength and physique sports training programmes: an international Delphi consensus approach. Sports Med Open 9:87. PMC10511399 | 2023 | Medium (coaches' consensus, not outcome data) | Deload definition. Cut volume, may keep intensity, train further from failure. Planned or autoregulated. Triggers include fatigue at any point |
| S57 | Rogerson D, Nolan D, Androulakis Korakakis P, Immonen V, Wolf M, Bell L. Deloading practices in strength and physique sports: a cross-sectional survey. Sports Med Open 10:26. PMC10948666 | 2024 | Single study (survey, 246 athletes) | Deloads every 5.6 ± 2.3 weeks, lasting 6.4 ± 1.7 days. Volume down, frequency kept |
| S58 | Coleman M, Burke R, Augustin F, et al. Gaining more from doing less? The effects of a one-week deload period during supervised resistance training on muscular adaptations. PeerJ 12:e16777. peerj.com (CC BY) | 2024 | Single study (RCT) | A full week off at mid-program slightly reduced lower-body strength gains, with no effect on muscle size |
| S59 | Meeusen R, Duclos M, Foster C, et al. Prevention, diagnosis and treatment of the overtraining syndrome: joint consensus statement of ECSS and ACSM. Med Sci Sports Exerc 45(1):186–205; Eur J Sport Sci 13(1):1–24. HAL open copy | 2013 | High (consensus, pre-2015 classic) | Short-term overreaching vs longer-lasting decline. Overtraining is diagnosed by ruling other causes out, which needs a doctor |
| S60 | Psychological stress impairs short-term muscular recovery from resistance exercise. Med Sci Sports Exerc 44(11):2220–2227. PubMed 22688829 | 2012 | Single study (31 students) | Higher life stress was linked to slower strength recovery in the first hour after hard lifting |
| S61 | Stults-Kolehmainen MA, Bartholomew JB, Sinha R. Chronic psychological stress impairs recovery of muscular function and somatic sensations over a 96-hour period. J Strength Cond Res (2014). PubMed 24343323 | 2014 | Single study | Higher stress was linked to worse recovery over 4 days |
About these pages
This is general education, not medical, physiotherapy or personal coaching advice. We are not your doctor or physiotherapist, and we don't diagnose or treat injuries. Each page summarises published research and health guidance in our own words, with the sources linked. Everyone is different, so use what fits and leave what doesn't. If something hurts, an ache isn't improving, or you notice anything on our Red flags page, stop and see a qualified professional, such as a doctor or a registered physiotherapist. How you use this content is your choice and your responsibility. Terms
Credits. Warm-up routines and drills: VCS coaching (Visser Coaching Systems). Research summaries: the sources listed on each page.