Sporadic and Bouted Physical Activity and the Metabolic Syndrome in Adults

Clarke, Janine; Janssen, Ian

doi:10.1249/mss.0b013e31829f83a0

Cited by 57 publications

(76 citation statements)

References 22 publications

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“…Even though the current physical activity guidelines recommend that activity be accumulated in bouts of ≥10 minutes, most of these studies also examined the relative benefits of sporadic MVPA. The few studies specifically examining the value of bouted physical activity showed that sporadic versus bouted activity had similar associations with the metabolic syndrome, waist circumference, and body mass index . However, all of these studies employed cross‐sectional designs and examined intermediate end points.…”

Section: Discussionmentioning

confidence: 99%

Moderate‐to‐Vigorous Physical Activity and All‐Cause Mortality: Do Bouts Matter?

Saint‐Maurice

Troiano

Matthews

et al. 2018

JAHA

126

114

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BackgroundThe 2008 Physical Activity Guidelines for Americans recommends that adults accumulate moderate‐to‐vigorous physical activity (MVPA) in bouts of ≥10 minutes for substantial health benefits. To what extent the same amount of MVPA accumulated in bouts versus sporadically reduces mortality risk remains unclear.Methods and ResultsWe analyzed data from the National Health and Nutrition Examination Survey 2003–2006 and death records available through 2011 (follow‐up period of ≈6.6 years; 700 deaths) to examine the associations between objectively measured physical activity accumulated with and without a bout criteria and all‐cause mortality in a representative sample of US adults 40 years and older (n=4840). Physical activity data were processed to generate minutes per day of total and bouted MVPA. Bouted MVPA was defined as MVPA accumulated in bouts of a minimum duration of either 5 or 10 minutes allowing for 1‐ to 2‐minute interruptions. Hazard ratios for all‐cause mortality associated with total and bouted MVPA were similar and ranged from 0.24 for the third quartile of total to 0.44 for the second quartile of 10‐minute bouts. The examination of jointly classified quartiles of total MVPA and tertiles of proportion of bouted activity revealed that greater amounts of bouted MVPA did not result in additional risk reductions for mortality.ConclusionsThese results provide evidence that mortality risk reductions associated with MVPA are independent of how activity is accumulated and can impact the development of physical activity guidelines and inform clinical practice.

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Section: Discussionmentioning

confidence: 99%

Moderate‐to‐Vigorous Physical Activity and All‐Cause Mortality: Do Bouts Matter?

Saint‐Maurice

Troiano

Matthews

et al. 2018

JAHA

126

114

View full text Add to dashboard Cite

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“…Healy et al, showed associations between bouts of accelerometer measured sedentary time >30 minutes and obesity (19), and Carson et al, showed bouts of 20 minutes of sedentary time were associated with cardiometabolic biomarkers (5). Research has also begun to differentiate the relative benefits of sporadic-MVPA and MVPA-guideline in relation to cardiovascular health and metabolic syndrome (10). The present findings provide reassurance that the metrics used in these studies are reproducible and predictive of behavioral patterns.…”

Section: Discussionmentioning

confidence: 99%

An Evaluation of Accelerometer-derived Metrics to Assess Daily Behavioral Patterns

Keadle

Sampson

Lyden

et al. 2017

Medicine &Amp; Science in Sports &Amp; Exercise

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Introduction The way physical activity (PA) and sedentary behavior (SB) are accumulated throughout the day (i.e., patterns) may be important for health, but identifying measurable and meaningful metrics of behavioral patterns is challenging. This study evaluated accelerometer-derived metrics to determine if they predicted PA and SB patterns and were reliably measured. Methods We defined and measured 55 metrics that describe daily PA and SB using data collected by using the activPal (AP) monitor in four studies. The first two studies were randomized-crossover designs that included recreationally-active participants. Study one experimentally manipulated time spent in moderate-vigorous intensity physical activity (MVPA) and sedentary time and study two held time in exercise constant and manipulated SB. Study three included inactive participants who increased exercise, decreased sedentary time or both. The study conditions induced distinct behavioral patterns, thus we tested whether the new metrics could improve the prediction of an individual’s study condition after adjusting for the overall volume of physical activity or SB using conditional logistic regression. In a fourth study, we measured the three-month reliability for the pattern metrics by calculating intraclass correlations (ICCs) in a community-dwelling sample who wore the AP monitor twice for seven-days. Results In each of the experimental studies, we identified new metrics that could improve the accuracy for predicting condition beyond SB and MVPA volume. In study one, 23 metrics were predictive of a highly active condition and 24 metrics were predictive of a highly sedentary condition in study two. In the fourth study, the median ICC (25–75th percentiles) of the metrics were 0.59 (0.46, 0.65). Conclusions Several new metrics were predictive of patterns of SB, exercise and non-exercise behavior and are moderately reliable over a three-month period. Applying these metrics to determine if daily behavioral patterns are associated with health-outcomes is an important area of future research.

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“…First, we employed a prospective study design, which is an advance over previous cross-sectional studies. (4, 10, 21) Second, we analyzed data from a large, well characterized cohort with standardized measures of CVD risk factors in middle aged adults with close to equal proportions people who are White and Black. Lastly, we were able to examine short spurts of MVPA from a well-validated and objective measure of physical activity, the ActiGraph monitor.…”

Section: Discussionmentioning

confidence: 99%

“…However, short spurts may still be associated with health benefits. Recent cross-sectional studies objectively measuring physical activity with monitors show that short spurts of MVPA have a similar protective association with the prevalence of cardiovascular disease risk factors,(10) markers of obesity,(21) and metabolic syndrome(4) as bouted MVPA, i.e., MVPA lasting ≥ 10 minutes. However, the cross-sectional design of these studies limits the ability to establish a causal association.…”

Section: Introductionmentioning

confidence: 99%

Do Short Spurts of Physical Activity Benefit Cardiovascular Health? The CARDIA Study

White

Gabriel

Kim

et al. 2015

Medicine &Amp; Science in Sports &Amp; Exercise

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Background For optimal health benefits moderate to vigorous intensity physical activity (MVPA) is recommended in sustained bouts lasting ≥ 10 minutes. However, short spurts of MVPA lasting < 10 minutes are more common in everyday life. It is unclear whether short spurts of MVPA further protect against the development of hypertension and obesity in middle-aged adults beyond bouted MVPA. Methods Objectively measured physical activity was collected in the Coronary Artery Risk Development in Young Adults (CARDIA) study at the 20-year (2005–2006) examination, and blood pressure and BMI were collected at the 20-year and 25-year (2010–2011) examinations. Time spent in MVPA was classified as either bouted MVPA, i.e., ≥ 10 continuous minutes or short spurts of MVPA, i.e., < 10 continuous minutes. To examine the association of short spurts of MVPA with incident hypertension and obesity over five years, we calculated risk ratios (RR) adjusted for bouted MVPA and potential confounders. Results Among 1,531 and 1,251 participants without hypertension and obesity, respectively at Year 20 (Age 45.2 ±3.6, 57.3% Women, BMI 29.0 ± 7.0), 14.8% and 12.1% developed hypertension and obesity by Year 25. Study participants in the highest tertile of short spurts of MVPA were 31% less likely to develop hypertension 5 years later (RR=0.69 [0.49, 0.96]) compared with those in the lowest tertile. There was no statistically significant association of short spurts of MVPA with incident obesity. Conclusion These findings support the notion that accumulating short spurts of MVPA protects against the development of hypertension, but not obesity in middle-aged adults.

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Sporadic and Bouted Physical Activity and the Metabolic Syndrome in Adults

Abstract: Within this representative sample of Canadian adults, sporadic MVPA was associated with the MetS to a similar order of magnitude as an equivalent volume of bouted MVPA.

Cited by 57 publications

References 22 publications

Moderate‐to‐Vigorous Physical Activity and All‐Cause Mortality: Do Bouts Matter?

Moderate‐to‐Vigorous Physical Activity and All‐Cause Mortality: Do Bouts Matter?

An Evaluation of Accelerometer-derived Metrics to Assess Daily Behavioral Patterns

Do Short Spurts of Physical Activity Benefit Cardiovascular Health? The CARDIA Study

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