The 7-week combined exercise intervention improved body composition and exercise performance in middle-aged adults, particularly benefiting those with shorter sedentary bouts.
Does a 7-week combined MICT and HIIT exercise program improve sedentary behaviour patterns, body composition, and cardiometabolic health in middle-aged sedentary adults?
A 7-week combined exercise intervention improved body composition and exercise performance but did not alter sedentary behavior patterns in middle-aged adults, with greater benefits seen in those with shorter baseline sedentary bouts.
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Sedentary behaviour (SB) presents a health risk independent of age, sex, and clinical disease status, while exercise interventions have been shown to potentially reduce sitting time. This study examined the effectiveness of a combined moderate-intensity continuous training (MICT) and high-intensity interval training (HIIT) program on SB patterns, body composition, and exercise performance among middle-aged adults. Quasi-experimental intervention study without a control group. Thirty-two adults (50% women, aged 38.25 ± 8.27) completed a 7-week program with three weekly sessions of cycling (MICT) and rowing (HIIT). Baseline accelerometer data were used to classify participants into Breaker (≤ 15 min sedentary bouts), Intermediator (15–20 min), and Prolonger (≥ 20 min) groups. Paired-sample t-tests and repeated measures ANOVAs assessed changes, with effect sizes reported as η²p and Cohen’s d. After intervention, the Breaker group showed increased breaks per sedentary hour and greater time in moderate-to-vigorous physical activity (MVPA) compared with Intermediator and Prolonger groups (all p 0.05). The 7-week combined exercise training improved body composition, cardiometabolic profile, and exercise performance but did not alter sedentary behaviour patterns in middle-aged adults. Nonetheless, individuals with shorter sedentary bouts experienced significant health and performance benefits than those with prolonged bouts, suggesting that baseline sedentary profiles may moderate responsiveness to exercise interventions.
Zhang et al. (Sun,) reported a other. The 7-week combined exercise intervention improved body composition and exercise performance in middle-aged adults, particularly benefiting those with shorter sedentary bouts.
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