Guide

Keeping muscle after 40: strength training, protein, recovery

Muscle is much more than looks: it stabilises joints and bones, burns energy and takes up blood sugar after meals. From midlife on, muscle is lost without targeted training – faster for women because of menopause. Here is what research says about preserving it and what a realistic start looks like.

Why preserving muscle matters now

In the SWAN study, lean mass began to decline with the menopause transition while fat mass rose twice as fast as before. Less muscle means less everyday strength, a higher risk of falls and fractures later on and lower energy use. Acting early builds a reserve for the decades ahead.

What strength training has been shown to do

A meta-analysis in postmenopausal women shows that resistance training improves physical function and bone density and reduces fat mass, without serious adverse effects. In the Australian MEDEX-OP trial, women with low bone density trained intensively twice a week for 40 minutes over eight months. Lumbar spine bone density rose, leg and back strength improved more than in the gentle comparison group, and training was well tolerated.

A realistic way to start

Two sessions a week are enough to begin with. Compound exercises that work many muscles at once are ideal: squats (onto a chair at first), lunges, rows with a band or dumbbell, wall or bench push-ups, hip thrusts. Two to three sets of eight to twelve reps, with the last two feeling hard. Progression matters: when it gets easy, add weight or reps. With pre-existing conditions or osteoporosis, check with a doctor first and plan the start with a trainer or physiotherapist.

Protein as building material

Training provides the stimulus, protein provides the material. The PROT-AGE expert group recommends at least 1.0 to 1.2 g of protein per kilogram of body weight per day for people over 65, and 1.2 g or more for those who exercise. Although aimed at older adults, it shows the direction: needs rise with age because muscle responds less to protein. More in the guide on protein needs after 40.

Recovery and vitamin D

Muscle grows during recovery, not during training. Enough sleep and a rest day between intense sessions belong in the plan. For vitamin D, a meta-analysis in older adults found that combining resistance training with vitamin D improved leg strength slightly more than training alone – but the evidence is tentative. A blood test tells you whether you are deficient; high-dose supplements taken blindly are not advisable.

In short

Muscle mass starts to decline with menopause
Two strength sessions a week improve strength and bone density
Progressive overload matters more than the perfect exercise
More protein supports muscle maintenance
Supplement vitamin D only after a blood test

Frequently asked questions

Will strength training make me bulky?

No. Women build muscle much more slowly for hormonal reasons. Strength training makes you stronger and firmer, not bulky.

Is cardio like walking or cycling enough?

It is valuable for heart and circulation, but usually not enough to preserve muscle. Muscle needs resistance – weights, bands or your own body weight.

Is it too late at 50 or 60?

No. Studies show gains in strength and bone density in postmenopausal women too. Earlier is better, but it is never too late.

Sources

Greendale GA et al. (2019): Changes in body composition and weight during the menopause transition. JCI Insight 4(5) PubMed DOI
Sá KMM et al. (2022): Resistance training for postmenopausal women: systematic review and meta-analysis. Menopause 30(1):108-16 PubMed DOI
Kistler-Fischbacher M et al. (2021): MEDEX-OP randomized controlled trial. J Bone Miner Res 36(9):1680-93 PubMed DOI
Bauer J et al. (2013): Evidence-based recommendations for optimal dietary protein intake in older people (PROT-AGE). J Am Med Dir Assoc 14(8):542-59 PubMed DOI
Antoniak AE, Greig CA (2017): Combined resistance training and vitamin D supplementation in older adults: meta-analysis. BMJ Open 7(7):e014619 PubMed DOI