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Daily Physical Activity Does Not Contribute to Differences in Muscle Oxidative Capacity Between Overweight and Obesity
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Daily Physical Activity Does Not Contribute to Differences in Muscle Oxidative Capacity Between Overweight and Obesity
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Journal Article
Daily Physical Activity Does Not Contribute to Differences in Muscle Oxidative Capacity Between Overweight and Obesity
2024
Overview
ABSTRACT
Background
The interaction between physical activity, skeletal muscle health, and adiposity has been explored in normal weight and overweight/obesity grouped together; however, the overall risks associated with being overweight are less than those observed with obesity and can be confounded by disparities in both sex and race. Thus, the present study sought to investigate the intricate interplay of daily physical activity and skeletal muscle oxidative capacity (SMOC) in overweight and obesity, while exploring how sex and race impact this dynamic relationship.
Methods
One hundred and forty participants were grouped by body mass index (BMI) as overweight (n = 73; BMI >25–<30 kg/m2) or obese (n = 67; BMI ≥30 kg/m2). SMOC was assessed using near‐infrared spectroscopy and daily physical activity was assessed for 7 days using accelerometry.
Results
Overweight individuals exhibited a higher (p = 0.004) SMOC and engaged in more (p = 0.007) vigorous physical activity compared to obese individuals. In addition, SMOC was lower (p = 0.005) in obese non‐Hispanic Black (NHB) men compared to overweight NHB men. No relationships between physical activity and SMOC were observed.
Conclusion
Physical activity is not associated with differences in SMOC in overweight and obesity. Obese individuals engage in less vigorous physical activity and exhibit lower SMOC compared to overweight individuals and these differences are emphasised in NHB men.
Overweight individuals exhibit higher skeletal muscle oxidative capacity and engage in more vigorous physical activity compared to their obese counterparts. No correlation between physical activity and muscle oxidative capacity were observed and suggest that factors beyond increased activity contribute to greater muscle oxidative capacity in overweight versus obese individuals.
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