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Association between Objectively measured Physical Activity and Sedentary Behavior with Body Composition among Primary
Masoud Shakki1, Reza Rezaeeshirazi1, Neda Aghaei Bahmanbeglou1
1Department of Physical Education and Sport Sciences, Aliabad Katoul Branch, Islamic Azad University, Aliabad Katoul, Iran.
Background:
Physical activity (PA) plays a crucial role in the overall well-being of children in the long term. The present study aimed to investigate the correlation between PA, sedentary behavior (SB), and body composition (BC) among primary school children.
Methods:
This descriptive-correlational study was conducted in Ali-Abad-Katoul, Iran in 2023. A sample size of 322 boys was selected using convenience sampling method. ActiGraph wGT3X-BT accelerometer and Body Composition X-Scan Plus II were used for measuring PA pattern and BC. Pearson correlation and Independent t tests were used to analyze the data.
Results:
The accelerometer data revealed that participants spent 67.55% of the total time in SB. Moreover, on average, daily moderate-to-vigorous physical activity (MVPA) was 49.71±22.37 minutes. Accordingly, the daily energy expenditure was 558.39±250.17 kcal. SB was directly and significantly associated with Body Mass Index (BMI) (r=0.628, P<0.001) and Mass of Body Fat (MBF) (r=0.347, P<0.001). In addition, our results revealed an inverse and significant correlation between MVPA with BMI (r=-0.849, P<0.001) and MBF (r=-0.716, P<0.001). Finally, the children who did meet the MVPA guideline had significantly lower BMI (t=-3.781, P<0.001) and MBF (t=4.892, P<0.001) and higher Skeletal Muscle Mass (SMM) (t=4.209, P<0.001) than those who did not meet the MVPA guideline.
Conclusions:
These findings suggested that vigorous PA and SB play a role in controlling children's adiposity, highlighting the importance of engaging children in high-intensity PA and reducing SB.
