A groundbreaking study reveals that women gain significantly more health benefits from regular exercise than men, often with less effort, leading to a profound re-evaluation of current physical activity guidelines and inspiring a new era of personalized wellness.
In a significant shift for public health recommendations, recent research highlights that women often reap greater health benefits from regular exercise than men, even when putting in less effort. These findings suggest a powerful opportunity for women to live healthier and longer lives, challenging long-held assumptions about universal exercise guidelines.
A comprehensive study supported by the National Institutes of Health (NIH) and published in the Journal of the American College of Cardiology found that women who exercise regularly have a significantly lower risk of early death or fatal cardiovascular events compared to men, even with less physical activity. Over two decades, women were 24% less likely to experience death from any cause than inactive individuals, compared to 15% for men.
The Unequal Rewards of Effort: Women’s Enhanced Benefits
The benefits extended specifically to cardiovascular health, with women seeing a 36% reduced risk for a fatal heart attack, stroke, or other cardiovascular event, while men experienced a 14% reduced risk. These compelling statistics underscore that exercise is an incredibly powerful way for women to boost their health and longevity.
Dr. Susan Cheng, a cardiologist and senior author of the study at the Smidt Heart Institute at Cedars-Sinai, Los Angeles, emphasized the importance of these findings. “We hope this study will help everyone, especially women, understand they are poised to gain tremendous benefits from exercise,” she stated, adding that women on average tend to exercise less than men, making these findings a strong inspiration for increased movement.
The research, which analyzed data from over 400,000 U.S. adults aged 27-61, found this disparity across all types of exercise, including:
- Moderate aerobic activity: Such as brisk walking or cycling.
- Vigorous exercise: Like spinning classes or jumping rope.
- Strength training: Including body-weight exercises or weightlifting.
Less Time, Same Impact: Efficiency in Exercise for Women
One of the most striking revelations is that women achieved similar health benefits to men in significantly shorter amounts of time. For instance:
- For moderate aerobic exercise, women achieved an 18% reduced risk of premature death with just 140 minutes (under 2.5 hours) per week, while men needed 300 minutes (five hours) to reach the same benefit.
- In vigorous aerobic exercise, women met a 19% reduced risk mark with only 57 minutes a week, compared to 110 minutes required by men.
These benefits also applied to strength training. Women engaging in strength-based exercises saw a 19% reduced risk for death compared to 11% for men. Furthermore, women who did strength training experienced an even greater reduction in cardiovascular-related deaths—a 30% reduced risk, compared to 11% for men.
A separate study published in Nature Cardiovascular Research echoed these findings, demonstrating that women could lower their heart event risk by 30% with 250 minutes of physical activity per week, while men needed 530 minutes to achieve the same reduction. This indicates a consistent pattern of women deriving greater cardiovascular benefits with half the exercise time.
The Physiological Edge: Why Women Benefit More
Scientists theorize that multiple factors contribute to these sex differences in exercise outcomes. Variations in anatomy and physiology play a crucial role. Men generally have increased lung capacity, larger hearts, more lean-body mass, and a greater proportion of fast-twitch muscle fibers. Consequently, women may utilize additional respiratory, metabolic, and strength demands to perform the same movement, leading to greater health rewards.
Estrogen levels are also a significant factor. Before menopause, women’s higher estrogen levels may offer protective benefits for cardiovascular health, potentially explaining why women tend to develop heart events later in life than men. Though the Nature Cardiovascular Research study participants were generally older and likely past menopause, suggesting the benefits might persist or be related to broader physiological differences.
Rethinking Exercise Guidelines for a Personalized Future
Despite these profound benefits, current data indicate a gap in exercise participation. Only 33% of women and 43% of men in the study met the standard for weekly aerobic exercise, and only 20% of women and 28% of men completed a weekly strength training session. This highlights a critical need to inspire more women to incorporate movement into their lives.
Dr. Emily Lau, director of women’s heart health at Brigham and Women’s Hospital, emphasized the need for tailored recommendations. “Women appear to have a physical activity advantage. Yet we see time and time again that women are less physically active and less likely to achieve the recommended physical activity targets,” she noted. “This highlights an opportunity for the medical community to think about how we can tailor our recommendations to women. Because what we are doing now is not quite working.”
The findings advocate for a future in personalized medicine, where interventions are specifically adapted to individual characteristics, including sex. As Eric J. Shiroma, a program director at the National Heart, Lung, and Blood Institute (NHLBI), affirmed, “A person’s physical activity needs and goals may change based on their age, health status, and schedule – but the value of any type of exercise is irrefutable.”
The physical activity guidelines for Americans currently recommend adults get 2.5-5 hours of moderate-intensity exercise or 1.25-2.5 hours of vigorous exercise each week, plus two or more days of strength-based activities. These new studies suggest that while these are valuable benchmarks, a more nuanced, sex-specific approach could unlock even greater public health benefits, especially for women.
