Do you lose muscle through the menopause?
Yes, the menopause accelerates muscle loss, and postmenopausal women lose more muscle mass than men of the same age. Strength training and sufficient protein intake are the best ways to slow that process.
Postmenopausal women lose more muscle mass and muscle strength than men of the same age. That difference is largely due to the sharp drop in oestrogen around the menopause. Oestrogen stimulates the division of muscle stem cells and suppresses inflammatory responses in muscle tissue. When that protection disappears, the process of muscle breakdown accelerates.
This is not a harmless complaint of fatigue. More than 70% of women experience muscle and joint complaints during the menopausal transition. In 1 in 4 of them, it is severe enough to temporarily prevent them from working. In some cases it goes beyond ordinary muscle loss and develops into sarcopenia: a clinically serious condition in which both muscle mass and muscle function are lost.
Besides hormonal fluctuation, too little exercise and insufficient protein intake are the most important factors you can influence yourself. Both accelerate muscle loss and amplify hormonal vulnerability. Getting enough exercise and eating sufficient protein are therefore the strongest tools currently available to slow this process.
Exercise works partly through the same pathways as oestrogen in muscle, and can partially compensate for the effects of hormonal decline. Strength training is the most thoroughly researched approach in this regard. Starting around the time of the menopause makes the greatest difference.
Hormone therapy with oestradiol is being investigated as a complementary approach, but the evidence is mixed: some studies show a positive effect on muscle mass and strength, others do not. It sounds promising, particularly as a supplement to exercise and good nutrition, but firm conclusions have not yet been reached. If you are interested in hormone therapy, discuss it with your doctor.
This answer is based on multiple review studies and a systematic review. The direction of the findings is consistent: the menopause accelerates muscle loss and increases the risk of sarcopenia. On the topic of hormone therapy, the studies are still contradictory, and no single study can fully establish cause and effect for all outcomes. The researchers themselves describe the evidence as moderate: there is enough to say with reasonable confidence that a decline in oestrogen is the cause, but for hormone therapy as a remedy the evidence base is too thin for a firm recommendation.