Exploring the Balance: How Physical Activity Intensity Affects Longevity
Recent research emphasizes the critical role of the intensity of physical activity (PA) over mere volume in extending lifespan and reducing disease risk. The study analyzed data from a large-scale survey, utilizing advanced accelerometry to measure the effects of PA intensity and volume on mortality. Key findings suggest that engaging in more intense physical activities substantially lowers the risk of death from cardiovascular diseases and other causes, challenging the common belief that longer durations of less intense exercise are equally beneficial.
The researchers observed that while both intensity and volume of PA contribute to health, the intensity offers more significant benefits for longevity. This insight is crucial for developing targeted exercise recommendations that focus on quality rather than quantity, aiming to optimize health outcomes. Moreover, the study introduces centile curves, providing a valuable tool for assessing PA levels against normative data, which could guide individuals in tailoring their exercise routines for maximum health benefits.
These revelations underscore the potential of integrating high-intensity activities into daily routines as a strategy for enhancing health and extending life expectancy. The study advocates for a shift in public health messages to highlight the importance of vigorous physical activities, offering a new perspective on exercise and wellness in the aging population.
Article Information
Intensity or volume: the role of physical activity in longevity
Published in European Journal of Preventive Cardiology. Schwendinger F. et al.
Abstract
Aims: To investigate how physical activity (PA) volume, intensity, duration, and fragmentation are associated with the risk of all-cause and cardiovascular disease mortality. To produce centile curves for PA volume and intensity representative of US adults.
Methods: This study is based on the observational 2011-2014 National Health and Nutrition Examination Survey (NHANES). Adults (age ≥20) with valid accelerometer, covariate, and mortality data were included. Average acceleration (AvAcc), intensity gradient (IG), and total PA served as proxies for volume, intensity, and duration of PA, respectively. Weighted Cox proportional hazard models estimated associations between outcome and PA metrics.
Results: In 7518 participants (52.0% women, weighted median age 49), there were curvilinear inverse dose-response relationships of all-cause mortality risk (81-month follow-up) with both AvAcc (-14.4% [95% CI -8.3 to -20.1%] risk reduction from 25th to 50th percentile) and IG (-37.1% [95% CI -30.0 to -43.4%] risk reduction from 25th to 50th percentile), but for cardiovascular disease mortality risk (N=7016, 82-month follow-up) only with IG (-41.0% [95% CI -26.7 to -52.4%] risk reduction from the 25th to 50th percentile). These relationships plateau at AvAcc: ∼35-45 mg and IG: -2.7 to -2.5. Associations of PA with all-cause and cardiovascular disease mortality are primarily driven by intensity and secondary by volume. Centile curves for volume and intensity were generated.
Conclusion: Intensity is a main driver of reduced mortality risk suggesting that the intensity of PA rather than the quantity matters for longevity. The centile curves offer guidance for achieving desirable PA levels for longevity.
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