Menopause and accelerated decline in the physical component of intrinsic capacity in Chinese women: a longitudinal cohort study

As the global population ages, a central question for public health is how to help people stay strong and independent for as long as possible. Scientists have developed a concept called intrinsic capacity, which is simply the sum of all the physical and mental abilities a person can draw upon to navigate their daily life. This includes things like how fast a person can walk, how strong their grip is, and how well they can balance. The World Health Organization places the preservation of this capacity at the heart of healthy aging, noting that when it declines, people become more vulnerable to falls, disability, and loss of independence. While it is well known that aging naturally wears down these abilities, researchers are increasingly interested in whether specific life events can speed up this process. For women, the most significant biological transition is menopause, the permanent end of menstruation and the sharp drop in estrogen that accompanies it. This shift is known to affect body composition and muscle strength, but it has remained unclear whether this transition specifically accelerates the loss of overall physical capacity in a measurable way over time.

A team of researchers in China set out to answer this question by looking at a large group of women over several years. They used data from the China Health and Retirement Longitudinal Study, a major national survey that tracks the lives of adults aged forty-five and older. The study focused on nearly five thousand women who were interviewed in 2011, 2013, and 2015. To measure physical capacity, the researchers did not rely on what the women said they could do, but rather on objective tests performed during the interviews. Each woman was asked to squeeze a handheld device to measure grip strength, walk a short distance to measure walking speed, and stand in a specific balance position for as long as possible. These three tests were combined into a single score that represented their overall physical capability. The researchers then tracked how this score changed over the four-year period, comparing women who had not yet reached menopause with those who had, and looking closely at how many years had passed since each woman stopped menstruating.

The results revealed a clear and distinct pattern. Women who had already gone through menopause experienced a faster decline in their physical capacity compared to women who had not. While premenopausal women showed a slight, steady improvement in their scores over the four years, postmenopausal women saw their scores drop. The difference was not just a one-time drop at the moment of menopause; rather, the rate of decline continued to speed up the longer a woman had been postmenopausal. For every additional year that passed since menopause, the decline in physical capacity became slightly steeper. This effect was most pronounced in women aged sixty and older. In this older group, the years since menopause were strongly linked to a faster loss of strength, speed, and balance. The study suggests that the menopausal transition marks a critical turning point where the natural aging process of physical decline is accelerated.

The researchers were careful to consider other factors that could influence these results, such as education, smoking, alcohol use, body weight, and existing health conditions. Even after accounting for these variables, the link between menopause and faster physical decline remained strong. The team also noted a curious detail in the data: women under the age of sixty showed a different pattern, where the years since menopause seemed to correlate with a slower decline or even a slight improvement. The authors explain this likely as a result of practice effects. Because the women took the same physical tests multiple times, the younger, generally more capable women may have gotten better at the tests simply through repetition, which masked the small amount of biological decline that was actually happening. In the older group, where baseline performance was lower, this practice effect was weaker, allowing the true biological decline associated with menopause to show up clearly.

This study provides the first longitudinal evidence that menopause is associated with an accelerated loss of physical capacity in Chinese women. It indicates that the years surrounding the menopausal transition are a vital window for monitoring health. By paying close attention to physical performance during this time, doctors and women themselves might be able to identify those at risk of losing independence sooner. The findings suggest that early interventions, such as targeted exercises to build muscle strength, could be particularly effective if started during the perimenopausal period. Rather than viewing the loss of physical ability as an inevitable and uniform part of aging, this research highlights that specific life stages can change the pace of that decline, offering a new opportunity to preserve function and promote healthy aging specifically for women.