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Researchers from Brigham and Women’s Hospital found that step and time-based exercise goals are equally effective in reducing mortality and cardiovascular risk, suggesting that personal preference should guide the choice of physical activity targets. The study calls for future guidelines to incorporate flexible, inclusive measures of physical fitness.
Since the emergence of smartwatches, step-based exercise goals have become increasingly popular. However, current physical activity guidelines lack specific recommendations for step counts. In a new study, researchers from, suggest that the choice of a time-based exercise goal or a step-based one is largely a matter of personal preference.
In this study, the researchers collected data from 14,399 women who participated in the Women’s Health Study and were free from cardiovascular disease and cancer. Between 2011 and 2015, participants aged 62 years and older were asked to wear research-grade wearables for seven consecutive days to record their physical activity levels, only removing the devices for sleep or water-related activities.
Higher levels of physical activity were associated with large risk reductions in death or cardiovascular disease – the most active quarter of women had 30-40% risk reductions compared with the least active quarter. And, individuals in the top three quartiles of physical activity outlived those in the bottom quartile by an average of 2.22 and 2.36 months respectively, based on time and step-based measurements, at nine years of follow-up.
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