Physical Activity Patterns and Mortality: The Weekend Warrior and Activity Bouts

PURPOSE This study aimed to examine how accelerometer-assessed physical activity accumulation patterns (e.g., is activity performed daily or only one or two days a week or is activity accrued in bouts) may affect the association with mortality. METHODS Adults (N = 3438), aged 40 years and older, who wore an accelerometer (ActiGraph 7164), were drawn from the longitudinal follow-up of the National Health and Nutritional Examination Survey (NHANES, 2003-2006), a population-based survey of the United States. Accelerometer-assessed moderate-to-vigorous physical (MVPA) was described by activity patterns. Participants engaging in the majority of their activity on only one or two days a week were classified as 'weekend warriors'. Activity bouts were defined as a period of at least moderate intensity lasting at least 10 minutes. Bout characteristics included bout frequency and length. Mortality was assessed through National Death Index matching through 2013. Mortality rates were compared among groups with different activity patterns. RESULTS Over an average follow-up of 77.4 months, 394 deaths occurred. Compared to participants with

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