Can Exercise Balance Your Hormones? What It Does to Testosterone, Estrogen and Cortisol

Medically reviewed by Mark Strehlow, MD, Medical Director — September 2026

Not in the broad way it’s often promised. Exercise changes several hormones, but most changes are brief or small. A hard workout raises testosterone, growth hormone and cortisol for a short time, and then they settle. The lasting effects come through what exercise does to your body: it helps your muscles respond to insulin, and when it reduces body fat, it tends to lower estrogen after menopause and can raise testosterone in men carrying extra weight. There’s no good evidence that running raises estrogen in men. Very heavy training without enough food can lower both testosterone and estrogen.

What happens to your hormones when you exercise

• Right after a workout. After resistance exercise, testosterone and growth hormone stay raised for about 15 to 30 minutes. Cortisol, the main stress hormone, rises with effort. In one small study, 30 minutes at moderate effort raised it by about 40% and hard effort by about 80%, while easy exercise didn’t raise it.
• For a day or two. Your muscles take up blood sugar more readily, and insulin works better for up to 24 to 48 hours, depending on how long and hard you exercised.
• Over months. Regular aerobic and strength training both improve how your body uses insulin, even without weight loss. Resting sex hormone levels change little unless your body fat changes.

Does running increase estrogen in men?

There’s no good evidence that it does. Men make estrogen by converting small amounts of testosterone, and body fat also makes estrogen. In a year-long randomized trial, 102 inactive men aged 40 to 75 did moderate to vigorous aerobic exercise for about six hours a week. Compared with men who didn’t exercise, their estradiol, testosterone and free testosterone didn’t change.

What moves estrogen in men is body fat. In a review of 24 studies of men with obesity, losing weight through diet or surgery lowered estradiol and raised testosterone, and the more weight men lost, the more their testosterone rose.

The training pattern linked to lower testosterone is high-volume endurance training, especially without enough food to cover it. In male endurance athletes, eating too little for the training load goes with lower testosterone and lower bone density. The short-term form tends to resolve once training and eating are back in balance, but some long-time endurance athletes keep low testosterone for years.

Does strength training raise testosterone?

Only briefly, and the brief rise doesn’t decide your results. In studies of young men, the size of the hormone rise after a workout didn’t predict gains in muscle or strength. Over months, a review of 11 randomized trials in 421 inactive men aged 19 to 75 found that aerobic, strength or combined training had no measurable effect on resting testosterone.

So lift to build muscle and bone, not to change your testosterone. If you have symptoms such as a low sex drive or low energy, a blood test is how to find out. Low testosterone is diagnosed only when symptoms go with low levels on blood testing.

Does exercise lower estrogen in women?

It depends on your stage of life:

• Before menopause: In a trial of 391 young women, 30 minutes of moderate aerobic exercise five times a week for 16 weeks didn’t change estradiol or other sex hormones.
• After menopause: Exercise lowers estrogen modestly, mostly through fat loss. In a year-long trial of 320 women, aerobic exercise lowered estradiol by about 7% compared with no change in routine. In another trial, the drop was limited to women who lost body fat; those who lost at least 2% saw estradiol fall by about 14%. See does estrogen cause weight gain? for how body fat and estrogen are linked.
• When training outpaces eating: Too few calories for the amount of exercise can lower estrogen, stop periods and weaken bones. Missed periods while training hard need a medical check.

Which exercise increases estrogen? None has been shown to. None of the trials above found that exercise raised estrogen.

Exercise in perimenopause and menopause

Exercise won’t treat hot flashes. The Menopause Society reviewed the evidence in 2023 and doesn’t recommend exercise or yoga for hot flashes and night sweats, because the evidence that they help is limited or inconsistent. Hormone therapy remains the most effective treatment for them, although it isn’t right for everyone, and several nonhormone options have good evidence too.

Where exercise matters is muscle and bone. Bone loss from falling estrogen is the main contributor to osteoporosis after menopause, and The Menopause Society recommends regular physical activity for all women after menopause. In a trial of 101 women averaging 65 years old with low bone density, eight months of supervised heavy strength and impact training twice a week raised spine bone density by about 3%, while it fell in a low-intensity home program. If you have low bone density, start with a qualified trainer. Strength training also helps you keep muscle, a large part of healthy body composition.

Does exercise raise or lower cortisol?

Both. A single hard workout raises cortisol, which is a normal response, and easy exercise doesn’t. Over time, fitter people may react less to everyday stress: in a small study, trained men had a smaller cortisol rise during a stressful speaking test than untrained men. In a review of 42 trials, programs that included yoga were linked to lower waking and evening cortisol than comparison activities, although the programs varied widely.

How much exercise to aim for

The federal Physical Activity Guidelines recommend at least 150 to 300 minutes of moderate aerobic activity a week, such as brisk walking, plus muscle-strengthening activity on at least two days. There’s no special “hormone workout.” A mix of aerobic and strength training, with enough food to fuel it, is what the evidence supports.

When to get your hormones checked

Exercise can’t fix a hormone problem. It’s worth an evaluation if you notice:

• A low sex drive or low energy that doesn’t improve with better sleep and training
• Missed or irregular periods, especially while training hard
• Hot flashes, night sweats or new sleep problems in your 40s or 50s
• Losing muscle or gaining fat despite regular training

Common questions