Scholarlink

Objectives <p>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.</p> Design <p>Quasi-experimental intervention study without a control group.</p> Methods <p>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&#xa0;min sedentary bouts), Intermediator (15–20&#xa0;min), and Prolonger (≥ 20&#xa0;min) groups. Paired-sample t-tests and repeated measures ANOVAs assessed changes, with effect sizes reported as η²p and Cohen’s d.</p> Results <p>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 <i>p</i> &lt; 0.05). Breakers also reduced body fat percentage, waist–hip ratio, and total cholesterol (<i>p</i> &lt; 0.05–0.01), alongside improved maximum cycling (<i>p</i> = 0.001) and rowing load (<i>p</i> = 0.02). The Intermediator group demonstrated a reduction in body fat percentage (<i>p</i> = 0.005). However, mean sedentary bout duration, reflecting sedentary behaviour accumulation patterns, did not change significantly in any group (<i>p</i> &gt; 0.05).</p> Conclusions <p>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.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effectiveness of combined exercise intervention on sedentary behaviour patterns, body composition, and cardiometabolic health among middle-aged adults

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月28日

查看全文
  • Boyi Zhang,
  • Ziteng Yang,
  • Mingyue Yin,
  • Yuting Xie,
  • Hui Zuo,
  • Tao Zhang,
  • Siman Lei,
  • Chuanzhi Wang,
  • Sulin Cheng,
  • Xiuqiang Wang

摘要

Objectives

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.

Design

Quasi-experimental intervention study without a control group.

Methods

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.

Results

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). Breakers also reduced body fat percentage, waist–hip ratio, and total cholesterol (p < 0.05–0.01), alongside improved maximum cycling (p = 0.001) and rowing load (p = 0.02). The Intermediator group demonstrated a reduction in body fat percentage (p = 0.005). However, mean sedentary bout duration, reflecting sedentary behaviour accumulation patterns, did not change significantly in any group (p > 0.05).

Conclusions

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.