Midlife Women: The Key to a Longer Life Could Be 150 Minutes of Exercise Weekly
For women navigating the complexities of midlife, a significant Australian study has shed light on a crucial question: how much exercise is truly needed to extend longevity? The findings are compelling, suggesting that consistently engaging in 150 minutes of moderate-to-vigorous physical activity each week could dramatically reduce the risk of premature death by approximately half. This research offers a clear benchmark for women seeking to optimise their health and well-being as they age.
The comprehensive study, detailed in the journal PLOS Medicine, drew upon an extensive dataset encompassing over 11,000 Australian women. These participants were born between 1946 and 1951, placing them firmly in the midlife demographic. Over a substantial period, spanning from 1996 to 2019, researchers meticulously collected self-reported information on their physical activity levels on nine separate occasions, roughly every three years. This longitudinal approach allowed for an unprecedented understanding of how activity patterns evolve over time.
Understanding the Guidelines and the Study’s Findings
The collected data was then benchmarked against the World Health Organisation’s (WHO) established guidelines for physical activity. These guidelines recommend a minimum of 150 minutes of moderate-to-vigorous physical activity per week. Activities that qualify include brisk walking, swimming, jogging, and participating in sports.
The study’s lead author, Dr Binh Nguyen from the Prevention Research Collaboration at the University of Sydney’s School of Public Health, highlighted the significance of the study’s extensive scope. “Most previous studies have measured physical activity only at a single point, and these fail to capture how activity levels may change as we age,” she explained. This focus on consistent engagement over time is what sets this research apart.
The results were striking. Women who consistently adhered to the recommended 150 minutes of moderate-to-vigorous physical activity per week experienced an incidence of death of 5.3 per cent. In stark contrast, those who consistently failed to meet these guidelines saw a significantly higher death rate of 10.4 per cent. While the study couldn’t pinpoint an exact age at which meeting these recommendations began to have an effect, it strongly suggested that becoming more active at any stage of life yields tangible benefits.
Beyond Lifespan: The Broader Health Benefits of Activity
While the study’s primary focus was on reducing the risk of early death, preliminary findings also indicated a similar or potentially stronger positive impact on mortality related to cardiovascular disease and cancer. However, the data in these specific areas was noted as inconclusive, warranting further investigation.
Professor Anne Tiedemann, a leading expert in physical activity and health at Sydney’s School of Public Health, who was not directly involved in the study, offered valuable perspective. She acknowledged the importance of physical activity guidelines as a benchmark but cautioned against viewing them as the sole determinant of health, particularly considering the multifaceted stressors women in midlife often encounter.
“Even small amounts of physical activity have benefits,” Professor Tiedemann stated. She emphasised the importance of encouraging any level of activity, even if it falls short of the 150-minute benchmark. “Otherwise, we run the risk of people just giving up if they can’t meet that,” she added, advocating for a more inclusive and encouraging approach to promoting exercise.
Dr Nguyen also acknowledged certain limitations inherent in the study, primarily its reliance on self-reported data. She noted that data derived from wearable trackers, which offer greater accuracy, would provide an even more precise picture. Nevertheless, Professor Tiedemann maintained that these limitations should not diminish the core message of the research. “The science is important, but we have so much evidence about the benefits of physical activity,” she affirmed.
Addressing a Public Health Concern
The findings serve as a crucial reminder for middle-aged women about the importance of regular exercise. Recent data from the Australian Institute of Health and Welfare in 2022 indicated that a substantial 42.9 per cent of women aged 45 to 54 were not meeting the weekly requirements for moderate-to-vigorous exercise.
Dr Nguyen offered practical suggestions, stressing that incorporating exercise into one’s routine doesn’t need to be overly complicated. “It doesn’t have to be too complicated – it can be just brisk walking, it can be some social tennis, cycling,” she suggested, highlighting accessible and enjoyable options.
Professor Tiedemann further underscored the importance of focusing on the benefits of exercise for “health span” – the period of life spent in good health – in addition to “lifespan.” “We know that being more active helps us get through the day, manage our stress, feel happy and promotes social connection,” she concluded, underscoring the holistic positive impact of a physically active lifestyle.
