AUTHOR=Wang Yifei , Yang Xin , Deng Jiamei , Wang Zhenshan , Yang Dongxue , Han Yanbai , Wang Hongli 

TITLE=Combined high-intensity interval and resistance training improves cardiorespiratory fitness more than high-intensity interval training in young women with overweight/obesity: a randomized controlled trial

JOURNAL=Frontiers in Endocrinology

VOLUME=15

YEAR=2024

URL=https://www.frontiersin.org/journals/endocrinology/articles/10.3389/fendo.2024.1450944

DOI=10.3389/fendo.2024.1450944

ISSN=1664-2392

ABSTRACT=<sec><title>Objective</title><p>This study aimed to compare the effects of high-intensity interval training (HIIT) combined with resistance training (RT) versus HIIT alone on body composition, cardiorespiratory fitness and glycolipid metabolism in young women with overweight/obesity.</p></sec><sec><title>Methods</title><p>This randomized controlled trial divided 40 subjects into an experimental group (HIIT+RT) and a control group (HIIT). Both groups underwent training three times per week for eight weeks. Body composition, cardiorespiratory fitness and glycolipid levels were assessed before and after the intervention.</p></sec><sec><title>Results</title><p>The results revealed that compared to baseline, both the experimental and control groups showed significant improvements in body weight, body mass index (BMI), Body fat, waist circumference (WC), waist-hip ratio (WHR), peak oxygen uptake (VO<sub>2</sub>peak), vital capacity (VC), oxygen pulse (VO<sub>2</sub>/HR), minute ventilation, resting heart rate, blood oxygen saturation, blood pressure, fasting blood glucose, triglycerides and high-density lipoprotein cholesterol (<italic>p</italic>&lt;0.05). Additionally, a significant increase in muscle mass and a significant reduction in 2-hour postprandial glucose were observed in the experimental group (<italic>p</italic>&lt;0.05). Muscle mass (mean difference: 2.75%), VO<sub>2</sub>peak (mean difference: 1.61 mL/min/kg), VC (mean difference: 334mL), and VO<sub>2</sub>/HR (mean difference: 0.51mL/beat) showed greater improvement in the HIIT+RT group compared to the HIIT group (<italic>p</italic>&lt;0.05).</p></sec><sec><title>Conclusion</title><p>In conclusion, an 8-week regimen of either combined HIIT and RT or HIIT significantly improves body composition, cardiorespiratory fitness and glycolipid metabolism in women with overweight/obesity. However, the combined training appears to offer more benefits than HIIT alone. Further research is needed to evaluate the long-term effects and feasibility of combined training.</p></sec><sec><title>Trial registration</title><p><uri xlink:href="https://www.chictr.org.cn/" xmlns:xlink="http://www.w3.org/1999/xlink">https://www.chictr.org.cn/</uri>, identifier ChiCTR2300075961.</p></sec>