Strength training after 40, the single best investment you can make
Two sessions a week changes your metabolism, your bones and your hormones more than any amount of extra cardio.
By Adri Daniel · 28 July 2026
For years women were told to do more cardio and eat less. It is one of the most costly pieces of advice in modern health, because it quietly removed the tissue that protects metabolism, bone, blood sugar and independence in later life.
What muscle is actually doing for you
Skeletal muscle is where the majority of glucose is taken up after a meal. It is a major determinant of resting energy expenditure. It supports posture, joint health and balance, and mechanical loading is the primary stimulus that tells bone to hold onto its density. Oestrogen is protective of bone, so the years around perimenopause are precisely when that stimulus matters most.
How much is enough
- Two full body sessions a week is the threshold where most of the benefit appears
- Six to ten working sets per major muscle group per week is a sensible starting range
- Finish most sets with two or three repetitions still available rather than to complete failure
- Progress by adding a little weight or one more repetition over time, not by adding more days
- Walk daily alongside it, and keep hard conditioning to a small share of the week
Training with your cycle rather than against it
The strict four phase cycle syncing protocols circulating online are more prescriptive than the evidence supports. What holds up is simpler: keep the weekly structure consistent, and adjust intensity based on how you actually feel. Many women find the follicular phase suits heavier work and the late luteal phase suits slightly lower volume. Some notice very little difference. Both are normal.
Consistency across months beats optimisation across days, every time.
When training becomes part of the problem
Training is a stressor, and stressors accumulate. If sleep is poor, work is heavy and life is full, adding five high intensity sessions a week will raise your total load rather than improve your health. The signs are familiar: performance drifting downwards, persistent soreness, a cycle that becomes irregular, catching every illness going, and feeling worse rather than better after training.
The right dose is the one your body can recover from. In a busy life, that is usually less than you think and more consistent than you expect.
Your next step
Which of these is actually driving your symptoms?
The free hormone quiz takes a few minutes and gives you one clear picture of what is most likely going on, plus where to begin.
Take the free quizCommon questions
- How often should women over 40 strength train?
- Two full body sessions a week captures most of the benefit for muscle, bone and blood sugar. Three can help if recovery allows, but consistency matters more than frequency.
- Will lifting weights make me bulky?
- No. Building large amounts of muscle requires years of dedicated training and a substantial calorie surplus. What most women notice is a firmer shape, better energy and clothes fitting differently.
- Is cardio still worth doing?
- Yes, particularly walking and some moderate cardiovascular work for heart health. It simply should not replace resistance training, which is the part that protects muscle and bone.
