Australian Women in Midlife: Regular Exercise Halves Risk of Premature Death, New Research Reveals
Staying physically active is widely acknowledged as crucial for both mental and physical well-being, with even modest increases in movement yielding significant health advantages. Groundbreaking Australian research, recently published in the esteemed journal PLOS Medicine, has underscored the vital importance of maintaining physical activity for women navigating their 40s, 50s, 60s, and 70s. The study’s findings are particularly compelling: middle-aged women who consistently engaged in regular exercise were found to halve their risk of premature mortality.
Despite these clear benefits, lead researcher Binh Nguyen from the University of Sydney highlighted a concerning statistic: nearly half of Australian women aged between 45 and 64 are not meeting recommended physical activity levels. “It’s so important to remain physically active during this life stage because it can provide long-term health benefits,” Dr. Nguyen stated. “It cuts the risk of dying [early] by half, especially if they are regularly active over many years.” This research prompts a closer look at what the study reveals and its broader implications for Australian women and the general population as they approach middle age.
Unpacking the Study’s Findings and Methodological Rigour
The comprehensive research drew upon data from a substantial cohort of 11,169 women, all born between 1946 and 1951, who were participants in the Australian Longitudinal Study on Women’s Health (ALSWH). The ALSWH, initiated in 1996, stands as one of the most significant studies of its kind globally, meticulously tracking the health and well-being of over 58,000 Australian women.
A key strength of this particular investigation lies in its longitudinal approach. Unlike many studies that capture physical activity data at a single point in time, Dr. Nguyen’s team analysed the activity levels and health outcomes of women aged approximately 45 to 70 over a remarkable 15-year period. This extended timeframe allowed for a robust comparison between women who consistently reported exercising regularly and those who did not, offering insights akin to a long-term randomised controlled trial (RCT), but with the advantage of real-world observational data.
The results were striking: the incidence of death was significantly lower among women who consistently adhered to exercise guidelines, standing at 5.3 per cent, compared to 10.4 per cent in those who consistently fell short.
Joanne McVeigh, a leading movement behaviour scientist at Perth’s Curtin University, who was not involved in the study, commented on the research’s methodology. While acknowledging that true RCTs provide a high calibre of evidence, she pointed out their inherent limitations, such as being often short in duration, expensive, and susceptible to participant drop-out. Dr. McVeigh described the approach used by Dr. Nguyen’s team as “almost impossible to replicate as a real RCT,” adding, “I think this is one of the first times this method has been applied to a longitudinal physical activity data set.” She further suggested that while the study offers “reliable evidence,” its methodology should serve to complement, rather than replace, traditional RCTs in future research.
However, the study was not without its limitations. Researchers noted a reliance on participants’ self-reported exercise habits, which can be subject to recall bias. Additionally, the cohort primarily comprised healthy women, potentially limiting the generalisability of the findings to populations with pre-existing health conditions. A further area of uncertainty remains regarding the precise benefits for women who may have started meeting physical activity guidelines only partway through their midlife journey.
Understanding Physical Activity Guidelines: What’s Recommended?
Dr. Nguyen’s research benchmarked physical activity against the World Health Organization (WHO) guidelines. These guidelines recommend that individuals aged 18 and over engage in at least 150 minutes of moderate-intensity exercise per week.
It’s worth noting that Australia has also released its own updated 24-hour movement guidelines. These recommendations suggest that adults should aim for 30 minutes or more of moderate- to vigorous-intensity exercise on most days of the week, while also minimising sedentary time.
Regardless of the specific guideline used, a broad consensus among experts is that Australians are not moving enough. Stuart Biddle, a Professor of Physical Activity and Health at the University of Southern Queensland, attributes this to environmental factors. “Our environments are pushing us away from being physically active,” Professor Biddle explained. “We have too many cars, too much automation, too much sitting, so although the opportunities are there to choose to be physically active, a lot of people aren’t doing it.”
Data from the Australian Institute of Health and Welfare corroborates this concern, indicating that 37 per cent of people aged 18–64 and a substantial 57 per cent of those aged 65 and older are not meeting the recommended physical activity levels. Professor Biddle also observed that younger Australians generally tend to be more physically active than their older counterparts.
“Physical activity is extremely important for the body and the mind, and we shouldn’t underestimate how important it is,” he stressed. “You can’t say: ‘I was physically active 10 years ago, I’m not physically active now, but it doesn’t matter’. You are either physically active now and getting the benefits, or you’re not.”
It’s Never Too Late: Embracing Exercise at Any Age
A consistent message from all three experts – Dr. Nguyen, Professor Biddle, and Dr. McVeigh – is the profound and achievable benefit of commencing an exercise routine at any stage of life and maintaining it throughout one’s lifespan.
Reflecting on her study’s outcomes, Dr. Nguyen specifically highlighted the protective effect of physical activity against premature death for middle-aged women. She acknowledged, however, that integrating a new exercise routine can present challenges for this demographic. “There’s lots going on, they might be caring for kids, they might be caring for parents, they’re also working, they’re juggling a lot, physical activity could be neglected,” she conceded.
Professor Biddle further emphasised that regular exercise contributes not only to a longer life but also to a “better quality of life, not just quantity of life.” He reiterated the critical role of physical activity for both physical and mental health, urging against underestimating its impact.
When it comes to finding the right form of exercise, Dr. McVeigh advised focusing on personal enjoyment. “Find something you enjoy, fit it into your day, and build from there,” she suggested. Her recommendations for a balanced approach include aiming for 30 minutes of brisk walking five days a week, incorporating strength training (weights or bodyweight exercises) twice weekly, and including activities that enhance balance, such as yoga.
Crucially, Dr. McVeigh reinforced that it is never too late to start reaping the rewards of physical activity, even for those in their 40s or 50s. “The kids may be older, you know yourself better,” she remarked. “The investments you make in your body now will directly shape how vital, independent, and healthy you feel for the next 30 – 40 years.” This sentiment underscores the enduring and transformative power of physical activity, regardless of age.
