![]() Physical activity can be of a light, moderate, or vigorous intensity. Physical activity is an important determinant of morbidity and mortality within adults ( Tremblay et al., 2011 Warburton, Nicol & Bredin, 2006). The intensity of non-bouted activity is important, as embedded MVPA had a stronger association with the metabolic syndrome than sporadic LIPA and a comparable association to bouted MVPA. We could not examine the association between sporadic MVPA and the metabolic syndrome because participants accumulated such a marginal amount of this type of activity (i.e., median = 2 min/day, only 11% of participants accumulated ≥5 min/day).Ĭonclusion. Sporadic LIPA was not independently associated with the metabolic syndrome. For every 30 min/day of physical activity, the odds ratio (95% confidence interval) of the metabolic syndrome was reduced by 4% (1–7%) for bouted LIPA, 64% (51–71%) for bouted MVPA, and 57% (45–67%) for embedded MVPA. Associations were examined using logistic regression and controlled for relevant covariates. Metabolic syndrome status was determined using established criteria. Average minutes/day of sporadic LIPA, sporadic MVPA, bouted LIPA, bouted MVPA, and embedded MVPA (MVPA occurring within bouts of primarily LIPA) were calculated. A 10 min threshold differentiated bouted activity from sporadic activity. Each minute over the 7-day measurement period was classified as being of a sedentary, light, or moderate-to-vigorous intensity. Physical activity was measured over 7 days using Actigraph AM-7164 accelerometers. We studied a representative cross-sectional sample of 1,974 adults aged 20 years and older from the 2003–2006 US National Health and Nutrition Examination Survey. Specifically, we examined the association between sporadic MVPA and bouted and sporadic LIPA with the metabolic syndrome. The objective of this study was to examine the health benefits associated with physical activity that does not meet the physical activity guidelines criteria for bouted MVPA. There is a lack of evidence supporting the health benefits of other patterns and intensities of activity including sporadic MVPA (i.e., MVPA occurring in periods of fewer than 10 consecutive minutes) and light intensity physical activity (LIPA). Physical activity guidelines for adults only recognize the health benefits of accumulating bouted moderate-to-vigorous physical activity (MVPA), or MVPA occurring over at least 10 consecutive minutes.
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