Does Objectively Measured Physical Activity Intensity During School Differ by Level of Aerobic Capacity and Demographics Among Elementary Students?

Background:The purpose of this study was to assess the relationship between intensity of physical activity (PA) and body composition in 343 young women.Methods:Physical activity was objectively measured using accelerometers worn for 7 days in women 17 to 25 years. Body composition was assessed using the BOD POD.Results:Young women who spent less than 30 minutes a week performing vigorous PA had significantly higher body fat percentages than women who performed more than 30 minutes of vigorous PA per week (F = 4.54, P = .0113). Young women who spent less than 30 minutes per day in moderate to vigorous PA (MVPA) had significantly higher body fat percentages than those who obtained more than 30 minutes per day of MVPA (F = 7.47, P = .0066). Accumulating more than 90 minutes of MVPA per day was associated with the lowest percent body fat. For every 10 minutes spent in MVPA per day, the odds of having a body fat percentage above 32% decreased by 29% (P = .0002).Conclusion:Vigorous PA and MVPA are associated with lower adiposity. Young women should be encouraged to accumulate at least 30 minutes of MVPA per day, however getting more than 90 minutes a day is predictive of even lower levels of adiposity.

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Objectively measured absolute and relative physical activity intensity levels in postmenopausal women

European Journal of Sport Science ◽

10.1080/17461391.2018.1539528 ◽

2018 ◽

Vol 19 (4) ◽

pp. 539-548 ◽

Cited By ~ 5

Author(s):

Erreka Gil-Rey ◽

Sara Maldonado-Martín ◽

Natalia Palacios-Samper ◽

Esteban M. Gorostiaga

Keyword(s):

Physical Activity ◽

Postmenopausal Women ◽

Physical Activity Intensity ◽

Activity Intensity ◽

Objectively Measured

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Decreased Physical Activity With Subjective Pleasure Is Associated With Rumination and Avoidance Behaviors

10.21203/rs.3.rs-927489/v1 ◽

2021 ◽

Author(s):

Fumi Kagawa ◽

Satoshi Yokoyama ◽

Masahiro Takamura ◽

Koki Takagaki ◽

Yuki Mitsuyama ◽

...

Keyword(s):

Physical Activity ◽

Linear Regression Analysis ◽

Correlation Coefficients ◽

Autonomous Motivation ◽

Multiple Linear Regression Analysis ◽

Physical Activity Intensity ◽

Main Hypothesis ◽

Activity Intensity ◽

The Individual ◽

Objectively Measured

Abstract The main hypothesis for the relation between physical activity and mental health is that autonomous motivation, such as subjective pleasure for the activity, plays an important role. However, no report has described empirical research designed to examine the role of subjective pleasure in the relation between objectively measured physical activity and psychological indexes. We used accelerometers to collect data indicating participants' physical activity intensity during a week. Participants recorded their subjective pleasure of activity per hour. In 69% of them, the individual correlation coefficients between physical activity and pleasure in an hour (an index of Physical Activity-Pleasure; PA-PL) were positive (r=0.22, 95%Cl=[0.11 0.38]), indicating that pleasant sensations increased concomitantly with increasing physical activity. Conversely, 31% participants exhibited negative values of PA-PL, which means that the increase in physical activity had the opposite effect, decreasing pleasure. Multiple linear regression analysis showed that avoidance/rumination behaviors decreased significantly with increased PA-PL (β=-6.82, 95%CI: [-13.27 -0.38], p<.05). These results indicate that subjective pleasure attached to the PA is more important than the PA amount for reducing depressive behavior.

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Joint associations between objectively measured physical activity volume and intensity with body fatness: the Fenland study

International Journal of Obesity ◽

10.1038/s41366-021-00970-8 ◽

2021 ◽

Author(s):

Tim Lindsay ◽

Katrien Wijndaele ◽

Kate Westgate ◽

Paddy Dempsey ◽

Tessa Strain ◽

...

Keyword(s):

Physical Activity ◽

Specific Activity ◽

Vigorous Physical Activity ◽

Large Population ◽

Population Based ◽

Body Fatness ◽

Activity Intensity ◽

Light Activity ◽

Objectively Measured ◽

Objectively Measured Physical Activity

Abstract Background/Objectives Physical activity energy expenditure (PAEE) represents the total volume of all physical activity. This can be accumulated as different underlying intensity profiles. Although volume and intensity have been studied in isolation, less is known about their joint association with health. We examined this association with body fatness in a population-based sample of middle-aged British adults. Methods In total, 6148 women and 5320 men from the Fenland study with objectively measured physical activity from individually calibrated combined heart rate and movement sensing and DXA-derived body fat percentage (BF%) were included in the analyses. We used linear and compositional isocaloric substitution analysis to examine associations of PAEE and its intensity composition with body fatness. Sex-stratified models were adjusted for socio-economic and dietary covariates. Results PAEE was inversely associated with body fatness in women (beta = −0.16 (95% CI: −0.17; −0.15) BF% per kJ day−1 kg−1) and men (beta = −0.09 (95% CI: −0.10; −0.08) BF% per kJ day−1 kg−1). Intensity composition was significantly associated with body fatness, beyond that of PAEE; the reallocation of energy to vigorous physical activity (>6 METs) from other intensities was associated with less body fatness, whereas light activity (1.5–3 METs) was positively associated. However, light activity was the main driver of overall PAEE volume, and the relative importance of intensity was marginal compared to that of volume; the difference between PAEE in tertile 1 and 2 in women was associated with 3 percentage-point lower BF%. Higher vigorous physical activity in the same group to the maximum observed value was associated with 1 percentage-point lower BF%. Conclusions In this large, population-based cohort study with objective measures, PAEE was inversely associated with body fatness. Beyond the PAEE association, greater levels of intense activity were also associated with lower body fatness. This contribution was marginal relative to PAEE. These findings support current guidelines for physical activity which emphasise that any movement is beneficial, rather than specific activity intensity or duration targets.

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