Movement, Muscle & the Brain
Before we begin
“Which is the better predictor of how long you will live: your cholesterol or your grip strength? (Careful: the honest answer is "they tell you different things.")”
The teaching
- Sarcopenia. The European consensus defines sarcopenia as a muscle disease (muscle failure) rooted in adverse muscle changes that accrue across a lifetime; low muscle strength is the primary criterion, low muscle quantity or quality confirms it, and poor physical performance marks severe sarcopenia (Cruz-Jentoft et al., 2019). It is common in older adults but can occur earlier.
- Strength as a marker. In the PURE study of 139,691 adults in 17 countries, each 5 kg lower grip strength was associated with higher all-cause mortality (hazard ratio 1.16) and cardiovascular mortality (hazard ratio 1.17) over a median of four years (Leong et al., 2015). It is a prognostic marker, not proof that raising grip strength will change survival.
- Activity guidance. The WHO 2020 guidelines recommend that adults do 150–300 minutes a week of moderate activity (or 75–150 minutes vigorous), plus muscle-strengthening on two or more days a week; adults 65 and over should add multicomponent activity, including balance and strength, on three or more days a week. The guidelines stress that any activity counts and that sitting less matters too.
- Movement and the brain. A meta-analysis of randomised trials in adults over 50 found that exercise improved cognitive function (effect size 0.29), with aerobic, resistance, multicomponent and tai chi training all showing benefit, and benefits linked to sessions of 45–60 minutes at moderate intensity or more (Northey et al., 2018). Limits: trials were short-term and the search ended in 2016.
- Movement and cells. Regular activity is associated with better mitochondrial function in ageing skeletal muscle; this is an emerging research area.
- Low-barrier starts by life stage. 30s–40s: build a routine, add two strength sessions a week. 50s–60s: prioritise strength and balance, protect joints, build progressively. 70s and over: multicomponent training, falls prevention, supervised progression where frailty or conditions exist. [Dr Haq to confirm age-band wording and add practical examples.]
- Posture, mobility and persistent aches. Teach movement variety and graded loading. Persistent or worsening pain needs assessment (Lesson 4.5).
- Scope. Coaches design general activity plans within their training; they do not prescribe exercise for people with unstable cardiovascular disease, new chest symptoms or unexplained breathlessness without clearance.
Practitioner / Coach translation
Practitioner | Coach |
|---|---|
Screen for contraindications, medication effects, and falls risk; refer to physiotherapy or specialists | Use a readiness screen; refer anything outside it; progress gradually |
Explain strength and grip as risk markers | Frame strength as capacity to live well, without risk claims |
Myth vs Reality
Myth
Strength training is for the young, and cardio is enough.
Reality
Guidelines recommend both, and strength becomes more important with age.
Dr Haq’s 30 Seconds
A short personal take from your course director
Recording to come — 20–40 seconds in Dr Haq’s own words. Suggested angle: What you tell a patient over 50 who has never lifted weights.
A note on the evidence
Activity guidelines: consensus. Strength and mortality: observational prognostic marker. Exercise and cognition: moderate-quality trial evidence with limits. Exercise and mitochondria: emerging.
Patient Journey — Checkpoint 16
Richard Okafor46 yearsFinance director
From Checkpoint 11: VO2 max below average and visceral fat above range. Design a minimum-viable weekly plan for a man with two training sessions a week and little time. What would you ask before giving it?
How would you apply this lesson to Richard?
Mini case
A 68-year-old client wants to start lifting but had a fall last year. What do you do first?
Reflect before you move on
What is the smallest piece of movement you could add to your day without changing your schedule?
Format: Video · text · movement-readiness screen (downloadable) · quiz.
References
- López-Otín C, Blasco MA, Partridge L, Serrano M, Kroemer G. The hallmarks of aging. Cell 2013;153:1194–1217; and The hallmarks of aging: an expanding universe. Cell 2023;186:243–278. (As cited in Module 1.)
- Epel ES, Blackburn EH, Lin J, Dhabhar FS, Adler NE, Morrow JD, Cawthon RM. Accelerated telomere shortening in response to life stress. Proc Natl Acad Sci USA 2004;101(49):17312–17315.
- Telomere Research Network. Recommendations for the measurement of telomere length in population studies (precision and measurement error).
- Watson NF, Badr MS, Belenky G, et al. Recommended amount of sleep for a healthy adult: a joint consensus statement of the American Academy of Sleep Medicine and Sleep Research Society. J Clin Sleep Med 2015;11:591–592.
- Cappuccio FP, D'Elia L, Strazzullo P, Miller MA. Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studies. Sleep 2010;33:585–592.
- McEwen BS. Protective and damaging effects of stress mediators. N Engl J Med 1998;338:171–179.
- Levy BR, Slade MD, Kunkel SR, Kasl SV. Longevity increased by positive self-perceptions of aging. J Pers Soc Psychol 2002;83:261–270.
- Cruz-Jentoft AJ, Bahat G, Bauer J, et al. Sarcopenia: revised European consensus on definition and diagnosis. Age Ageing 2019;48:16–31.
- WHO Expert Consultation. Appropriate body-mass index for Asian populations and its implications for policy and intervention strategies. Lancet 2004;363:157–163.
- Joshi P, Islam S, Pais P, et al. Risk factors for early myocardial infarction in South Asians compared with individuals in other countries. JAMA 2007;297:286–294.
- Type 2 diabetes in migrant south Asians: mechanisms, mitigation, and management. Lancet Diabetes Endocrinol 2015;3:1004–1016.
- Alshamsi MA, Fatima W, Al Teneiji MT, Srinivasamurthy SK. Vitamin D status among apparently healthy individuals in the UAE: a systematic review. Front Nutr 2025;12:1604819.
- Oppenheim A, Jury CL, Rund D, Vulliamy TJ, Luzzatto L. G6PD Mediterranean accounts for the high prevalence of G6PD deficiency in Kurdish Jews. Hum Genet 1993;91:293–294.
- Kling J. Race-, ethnicity-based clinical guidelines miss the mark: study (report of Siddique S, Digestive Disease Week 2022). MDedge Family Medicine, 27 May 2022.
- Kauff ND, Perez-Segura P, Robson ME, et al. Incidence of non-founder BRCA1 and BRCA2 mutations in high risk Ashkenazi breast and ovarian cancer families. J Med Genet 2002;39:611.
- El-Shanti H, Majeed HA, El-Khateeb M. Familial Mediterranean fever in Arabs. Lancet 2006;367:1016–1024.
- De Sanctis V, Kattamis C, Canatan D, Soliman AT, et al. β-Thalassemia distribution in the Old World: an ancient disease seen from a historical standpoint. Mediterr J Hematol Infect Dis 2017;9(1):e2017018.
- Ojo AO, et al. APOL1 kidney disease: conclusions from a Kidney Disease: Improving Global Outcomes (KDIGO) Controversies Conference. Kidney Int 2025;108:763–779.
- Emmett E, O'Connell M, et al. South London Stroke Register analysis of ethnic and socioeconomic inequalities in stroke (30-year data). eClinicalMedicine 2026 (as reported by King's College London, July 2026).
- Brooks PJ, et al. The alcohol flushing response: an unrecognized risk factor for esophageal cancer from acetaldehyde exposure. PLoS Med (as reported in press coverage).
- American Diabetes Association guidance lowering the diabetes screening BMI threshold for Asian Americans to 23 (2015), as summarised by diaTribe. Press coverage differs on the exact wording and later changes; confirm the current ADA position before relying on it.
- Leong DP, Teo KK, Rangarajan S, et al. Prognostic value of grip strength: findings from the Prospective Urban Rural Epidemiology (PURE) study. Lancet 2015;386:266–273.
- Northey JM, Cherbuin N, Pumpa KL, Smee DJ, Rattray B. Exercise interventions for cognitive function in adults older than 50: a systematic review with meta-analysis. Br J Sports Med 2018;52(3):154–160.
- World Health Organization. Guidelines on physical activity and sedentary behaviour. 2020.
Key Points
- Tell people what a number is, what it is not, and what happens next, especially "biological age" results.
- Ask every person about sleep, stress and movement, and keep a record.
- Offer two or three sleep foundations and let the person pick one.
- Look for the signals of distress before deciding that stress is "good."
- Start strength and balance work early, and keep it gradual.
- Always ask the red-flag questions; refer promptly and document it.