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 consistently low levels on fasting morning blood tests, repeated to confirm.
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
How we evaluate hormones at Rock Creek Wellness
We start with your symptoms, training, eating and health history. Comprehensive blood testing measures total and free testosterone, estradiol, sex hormone binding globulin, cortisol and a full thyroid panel, along with hemoglobin A1c and fasting insulin. A DEXA body composition scan shows whether your training is building muscle or losing it. Every new patient has one when they establish care.
If your results point to a hormone problem, you and your provider decide together whether treatment fits your goals. For men, testosterone therapy is considered only when symptoms and repeated tests confirm low testosterone; see BHRT for men. For women in perimenopause or menopause, see BHRT for women. If your hormones aren’t the problem, we’ll tell you that too. Premier Care includes nutrition and exercise guidance built around your results. We’re a cash-pay clinic, the price is given at your consultation, and consultations for our care programs are free.
Common questions
How long does it take for exercise to affect hormones?
Insulin works better within a day of a session. In the trials above, estrogen changes after menopause showed up at 3 to 12 months, mostly in women who lost body fat. In men with obesity, the rise in testosterone tracked how much weight they lost.
Is there one exercise that fixes a hormonal imbalance?
No. It depends on what’s out of balance, which takes testing to find out. For most people, the guideline mix of aerobic and strength training is the place to start.
Sources
- Kraemer WJ, Ratamess NA. Hormonal responses and adaptations to resistance exercise and training. Sports Medicine 2005. PubMed
- Hill EE, et al. Exercise and circulating cortisol levels: the intensity threshold effect. Journal of Endocrinological Investigation 2008. PubMed
- Colberg SR, et al. Physical activity/exercise and diabetes: a position statement of the American Diabetes Association. Diabetes Care 2016. PMC
- Cleveland Clinic. Estrogen. 2026. clevelandclinic.org
- Cleveland Clinic. High estrogen. 2026. clevelandclinic.org
- Hawkins VN, et al. Effect of exercise on serum sex hormones in men: a 12-month randomized clinical trial. Medicine & Science in Sports & Exercise 2008. PubMed
- Corona G, et al. Body weight loss reverts obesity-associated hypogonadotropic hypogonadism: a systematic review and meta-analysis. European Journal of Endocrinology 2013. PubMed
- Cupka M, Sedliak M. Hungry runners: low energy availability in male endurance athletes and its impact on performance and testosterone. European Journal of Translational Myology 2023. PubMed
- Hackney AC. Hypogonadism in exercising males: dysfunction or adaptive-regulatory adjustment? Frontiers in Endocrinology 2020. PubMed
- West DW, Phillips SM. Associations of exercise-induced hormone profiles and gains in strength and hypertrophy in a large cohort after weight training. European Journal of Applied Physiology 2012. PubMed
- Morton RW, et al. Neither load nor systemic hormones determine resistance training-mediated hypertrophy or strength gains in resistance-trained young men. Journal of Applied Physiology 2016. PubMed
- Potter NJ, et al. Effects of exercise training on resting testosterone concentrations in insufficiently active men: a systematic review and meta-analysis. Journal of Strength and Conditioning Research 2021. PubMed
- Bhasin S, et al. Testosterone therapy in men with hypogonadism: an Endocrine Society clinical practice guideline. Journal of Clinical Endocrinology & Metabolism 2018. PubMed
- Smith AJ, et al. Effects of aerobic exercise on premenopausal sex hormone levels: results of the WISER study. Cancer Epidemiology, Biomarkers & Prevention 2011. PubMed
- Friedenreich CM, et al. Alberta physical activity and breast cancer prevention trial: sex hormone changes in a year-long exercise intervention among postmenopausal women. Journal of Clinical Oncology 2010. PubMed
- McTiernan A, et al. Effect of exercise on serum estrogens in postmenopausal women: a 12-month randomized clinical trial. Cancer Research 2004. PubMed
- American Academy of Orthopaedic Surgeons (OrthoInfo). Relative energy deficiency in sport (REDs). orthoinfo.org
- The North American Menopause Society. The 2023 nonhormone therapy position statement. Menopause 2023. PubMed
- The North American Menopause Society. Management of osteoporosis in postmenopausal women: the 2021 position statement. Menopause 2021. PubMed
- Watson SL, et al. High-intensity resistance and impact training improves bone mineral density and physical function in postmenopausal women with osteopenia and osteoporosis: the LIFTMOR randomized controlled trial. Journal of Bone and Mineral Research 2018. PubMed
- Rimmele U, et al. Trained men show lower cortisol, heart rate and psychological responses to psychosocial stress compared with untrained men. Psychoneuroendocrinology 2007. PubMed
- Pascoe MC, et al. Yoga, mindfulness-based stress reduction and stress-related physiological measures: a meta-analysis. Psychoneuroendocrinology 2017. PubMed
- U.S. Department of Health and Human Services. Physical Activity Guidelines for Americans: top 10 things to know. 2025. odphp.health.gov
