"So now my body doesn't make any female hormones at all?" This is a question those who have reached menopause often throw out in the clinic. The main factory called the ovary has stopped operating, but our body retains other pathways that make estrogen, even if in small amounts. An unexpected lead player among them is muscle. Today, based on society and research materials, I will organize how muscle—commonly regarded only as a 'tool for moving the body'—is directly connected to bone health after menopause, and why strength training is recommended.
Muscle is not a simple movement organ but an endocrine tissue that sends signals
It is easy to think of muscle only as tissue for strength or figure, but modern medicine sees muscle as an endocrine organ that sends signals throughout the body. When muscle contracts through exercise, substances called myokines are reported to be secreted and spread throughout the body along the bloodstream.
The action of these signaling substances does not stay in one place. When I explain it to patients in the clinic, I sometimes express it as "muscle plays the role of a kind of small hormone factory." Looking at the direction of myokine action that studies have organized, it is as follows.
- They are reported to head toward the brain and be involved in cognitive function and mood regulation
- They are known to act on blood vessels and metabolism and to influence inflammatory responses and insulin sensitivity
- And the most noteworthy part, they are involved in the balance between cells that make bone and cells that break it down
That is, muscle is not a still tissue but a tissue that constantly converses with other organs, and one of the partners in this conversation is precisely bone.
The reason bone weakens after menopause is not hormone deficiency alone
Many people understand post-menopausal osteoporosis simply as 'because estrogen decreased.' It is not a wrong statement, but recent studies show that in between there is a middle bridge called muscle. It is a kind of triangular relationship formed by estrogen, muscle, and bone.
A study published in Scientific Reports in 2022 reported that estrogen regulates the pattern of myokines secreted from muscle. When estrogen is sufficient, it keeps the balance so that muscle sends bone-friendly signals, but when estrogen decreases, this regulation is disturbed. At this time, the signals coming out of muscle can rather shift in the direction of raising the activity of osteoclasts, the cells that break down bone.
If you leave muscle neglected after menopause, the signals your muscle sends can rather act in a direction that weakens your bone. So muscle management in menopause is not simple exercise but directly connected to protecting bone.
This link also explains why sarcopenia and osteoporosis, which often accompany menopause, appear together in one person. A 2023 review in the Journal of Endocrinology organized that estrogen deficiency is simultaneously involved in decreased bone density and decreased muscle mass. If you are worried about bone health, it helps to also look at how to diagnose osteoporosis.
Why walking alone falls 2 percent short
"Doctor, I walk ten thousand steps every day; isn't that enough?" It is truly a good habit, and it is certainly beneficial for cardiovascular health. However, from the standpoint of preserving muscle mass and drawing out bone-beneficial signals, walking alone is a little lacking.
It is known that to turn on the signals that make bone, a resistance heavier than usual must be applied to muscle. Muscle and bone sense the magnitude of the load placed on them, and it is reported that only when sufficient stimulation comes in do they respond in the direction of "now I have to become harder." With a load on the level of light walking, this switch does not turn on sufficiently.
In fact, the 2018 LIFTMOR randomized controlled study targeting post-menopausal women with low bone density reported that high-intensity strength and impact exercise conducted under supervision helped improve lumbar bone density and physical function and was well tolerated without serious side effects. However, since intensity and posture are important, I recommend that those with osteoporosis first confirm an exercise intensity suited to their own state. If you are at a loss about where to start with exercise intensity, please inquire about the direction of menopausal exercise through chat consultation.
Aerobic exercise and strength training, what differs and how
In menopause management, the two exercises are not in a competitive relationship but partners with different roles. In the clinic, many say "I do exercise but always only walk," so I organize the difference between the two exercises in a table.
| Category | Aerobic exercise (walking·cycling) | Strength training (resistance exercise) |
|---|---|---|
| Main effect | Cardiopulmonary endurance, blood pressure·blood glucose management | Muscle mass maintenance, bone stimulation signals |
| Stimulus given to bone | Relatively weak | Strong with sufficient load |
| Myokine secretion | Some secretion | Reported more clearly with resistance stimulus |
| Menopause recommendation | Maintain as a baseline | Additionally combining it is recommended |
As the table shows, it by no means means to stop walking. Keep walking as is, but adding strength stimulation 2–3 times a week on top of it is a more balanced combination for the menopausal body. If you want to check the hormonal change itself along with exercise, the article on when to start menopausal hormone therapy is also worth referring to.
Menopausal strength management you can start at home
Just because it's strength training doesn't necessarily require grand gym equipment. The key is to regularly give sufficient stimulation to the lower body and large muscles. The lower-body muscles are known to be the largest muscle group in our body and the center of myokine secretion, so they become the priority of menopause management.
- Chair squat: repeat the motion of trying to sit on a chair, stopping with 1 centimeter to go, then standing up. If your balance is unstable, start by holding the chair's backrest
- Wall squat and calf raises: lean your back against the wall and hold, or raise your heels to load the calves
- Progressive load: when the same number of reps becomes easy, increase the reps or weight little by little to maintain stimulation at the level where the muscle feels 'pleasantly sore'
As important as exercise is the material. If the protein to build is lacking, even if you give stimulation, the muscle has difficulty sufficiently recovering·growing. Several expert groups organize that, to maintain muscle in older adults, protein intake above a certain level per body weight is recommended, and it is reported that dividing quality protein intake across each meal is better than cramming it into one meal. I also recommend taking care of nutrients involved in bone metabolism, such as vitamin D, together. If you are troubled about meal composition, please refer to what to eat after menopause.
There are people who especially benefit from taking care early
The connection between muscle and bone applies to all menopausal women, but from clinical experience there are people who do better to pay attention earlier. This is because, even with the same menopause, the starting line differs.
In cases of early menopause or reaching menopause at a relatively young age, as the period of decreased estrogen lengthens, the impact on muscle and bone also tends to accumulate. Those who usually have little activity or have been away from exercise for a while, and those with a lean build whose muscle mass itself is not ample, also have much to take care of in the same context.
In the clinic, it is not uncommon for someone to hesitate, saying "I haven't even been diagnosed with osteoporosis yet, do I already have to exercise too?" But it is known that for bone, protecting the foundation in advance is easier than reversing it once it has weakened. Managing muscle from when bone density is within the normal range is, in fact, the wiser order.
Looking at it together with hormone management is more reassuring
If strength training and nutrition are the foundation, for those with a large range of menopausal change, medical evaluation becomes another axis. A safe starting point is to confirm the current bone state with a bone density test and, if needed, check the hormonal change and overall menopausal symptoms together.
Hormone therapy is not applied uniformly to everyone but is an area decided by weighing the individual's symptoms and risk factors. While building the foundation of muscle and bone through exercise·nutrition, checking the menopause hormone state at the same time lets you respond more calmly to changes after menopause. If bone density or menopausal symptoms concern you, I recommend first grasping the current state with menopause screening.
If aching joints or a feeling of the back stooping accompanies it, rather than passing it off as simple aging, checking may be needed. Reading the association between joint pain and osteoporosis together helps in understanding your own symptoms.
Hormonal change is a flow of nature that we cannot stop. But within that flow, the weapon to protect my body can be built by oneself. Filling the place left by decreased estrogen with muscle—that is the most realistic and evidence-based anti-aging strategy. I hope you keep an upright back and a powerful gait for a long time. If you are curious about menopausal exercise and bone health, please consult comfortably by chat anytime.
Written by: Lee Dong-hee Director · Obstetrics and Gynecology Specialist · View doctor profile
First published January 5, 2026 · Last reviewed May 30, 2026
References: Norton et al., Scientific Reports (2022), Journal of Endocrinology review (2023), Watson et al. LIFTMOR Randomized Controlled Trial, Journal of Bone and Mineral Research (2018), PROT-AGE / ESPEN expert group protein recommendation (2014)
This article is intended to provide general health information and does not replace individual diagnosis or treatment. If you have symptoms, please consult through a medical visit.