Resistance training
Strength training does more than build muscle: people who do it have lower risk of death, heart disease, cancer and diabetes. The dose that gives most of the benefit is small, about 30 to 60 minutes a week.
At a glance
- Minimum: two full-body sessions a week of 20–30 minutes, one or two sets per exercise.
- Standard: two or three sessions a week, all major muscle groups, gradually adding load.
- What the studies link it to: roughly 10–17% lower risk of death, heart disease, cancer and diabetes, with most benefit at 30–60 minutes a week.1
- Check first if you have uncontrolled high blood pressure, a recent heart event, severe frailty, or take insulin.
What the research shows
A pooled analysis of cohort studies found that people who do muscle-strengthening activity have about 10–17% lower risk of death, cardiovascular disease, cancer and diabetes. The association was strongest at 30–60 minutes a week and did not increase further after that.1 A second analysis found about 15% lower all-cause mortality, and the greatest reduction in people who also did aerobic exercise.2
In trials, strength training improves strength, muscle mass, insulin sensitivity, function and mood, and modestly lowers blood pressure. The mortality figures are from observational studies, because trials cannot run to death, but the pattern is consistent and the dose is small.
How to do it
- Two sessions a week to start, full body, 20–30 minutes.
- Choose 5–6 big movements: a squat or sit-to-stand, a hinge (hip bridge or deadlift), a push, a pull, a carry or plank.
- Do 1–2 sets of 8–12 repetitions that leave 2–3 reps in reserve.
- Progress. When you can do the top number of reps with good form, add a little weight, a harder variation or one more set.
- Rest 48 hours before training the same muscle group again.
- Eat enough protein to support the work.
Two example workouts (A and B)
| Workout A | Workout B | |
|---|---|---|
| Legs | Squat to a chair (or goblet squat) | Reverse lunge (hold a support) |
| Hinge | Glute bridge | Romanian deadlift with dumbbells or a backpack |
| Push | Incline push-up (hands on a table) | Overhead press with dumbbells or bottles |
| Pull | Band row or dumbbell row | Band pull-apart or inverted row |
| Core | Plank, 20–30 seconds | Farmer carry, 30 metres |
Alternate A and B across the week. Warm up with 5 minutes of easy walking and a few bodyweight reps.
Track your progress
| Date | Exercise | Weight or version | Sets × reps | Notes |
|---|---|---|---|---|
Write down what you did, so next time you can do slightly more.
Who should be careful
Stop if you feel sharp pain.
Teenagers can train safely with good technique and supervision. No gym is needed: bodyweight, bands and household weights are enough to start.
Common mistakes
- Lifting for ego instead of form.
- Changing the programme every week, so nothing progresses.
- Skipping the legs.
- Assuming harder is better. A session that leaves you wrecked is not more effective.
- Using walking as a substitute. Walking and strength are complementary, not interchangeable. See the daily steps guide.
How to tell it is working
Weights or reps going up over weeks, easier stairs and getting up from a chair, and grip strength, a simple measure linked to long-term health. Waist, blood pressure and HbA1c can also improve.
How strong is the evidence
Grade A. Consistent analyses link muscle-strengthening with lower mortality and disease, and trials show clear benefits for strength and metabolism. The dose is characterised and the safety profile is good. The mortality evidence is observational, so it shows a strong association rather than proving cause.
References
Each reference links to PubMed or the publisher. The tag shows what kind of study it is; the grade above reflects all of them together, not any single one.
- Meta-analysis Momma H, et al. Muscle-strengthening activities are associated with lower risk and mortality in major non-communicable diseases: a systematic review and meta-analysis of cohort studies. Br J Sports Med 2022. About 10–17% lower risk of death, heart disease, cancer and diabetes; the benefit peaked at 30–60 minutes a week. PubMed 35228201 · DOI
- Meta-analysis Shailendra P, et al. Resistance training and mortality risk: a systematic review and meta-analysis. Am J Prev Med 2022. About 15% lower risk of death; combined with aerobic activity the reduction was largest. PubMed 35599175 · DOI
How I grade the evidence
Every guide carries a grade. It describes how well the research supports the advice, not how important the advice is. Grades come from a written rubric and are re-checked as new studies appear.
- AStrongConsistent results from high-quality meta-analyses or several trials, a clear size of benefit, well-understood risks.
- BModerateAt least one good systematic review or several solid trials. Promising, with real uncertainty about dose, groups or the long term.
- CLimited but plausibleSome human evidence, but small, mixed or specific to one condition. Reasonable and low-risk, not proven.
Grade D (animal, mechanistic or influencer-driven claims) and E (disproven or unsafe) are not published here.
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