Effect of a 12-week non-contact exercise intervention on body composition and health-related physical fitness in adults: a pilot test

Abstract

[Purpose] The purpose of this study was to evaluate the effects of a 12-week non-contact exercise intervention on body composition and health-related physical fitness in adults.[Methods] One hundred adults were initially enrolled; however, ninety-seven participants (men: n = 41, women: n = 56) completed the study. The non-contact exercise was performed for 12 weeks using a smart tracker (Charge 4, Fitbit, USA) and mobile phone applications. The non-contact exercise program included resistance, aerobic, and flexibility exercises.[Results] The results showed that percent body fat (<i>F</i>=4.993, <i>p</i>=.016, η_p²=.049), fat-free mass (<i>F</i>=4.690, <i>p</i>=.024, η_p²=.047), and skeletal muscle mass (<i>F</i>=5.623, <i>p</i>=.004, η_p²=.055) significantly changed during the intervention period. Further, significant increases were seen in hand grip strength (<i>F</i>=12.167, <i>p</i><.001, η_p²=.112), sit-and-reach (<i>F</i>=20.497, <i>p</i><.001, η_p²=.176), sit-ups (<i>F</i>=42.107, <i>p</i><.001, η_p²=.305), and VO_2max (<i>F</i>=4.311, <i>p</i>=.037, η_p²=.043).[Conclusion] Our findings suggest that 12 weeks of non-contact exercise improves body composition and health-related physical fitness. Wearable technologies encourage individuals to modify their lifestyles by increasing physical activity and achieving the goal of maintaining health conditions among adults.