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标题：Alternating high-intensity interval training and continuous training is efficacious in improving cardiometabolic health in obese middle-aged men
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作者：Eric Tsz-Chun Poon ; Parco Ming-Fai Siu ; Waris Wongpipit 等
期刊名称：Journal of Exercise Science and Fitness
印刷版ISSN：1728-869X
出版年度：2022
卷号：20
期号：1
页码：40-47
DOI：10.1016/j.jesf.2021.11.003
语种：English
出版社：Elsevier
摘要：AbstractBackground/ObjectivesHigh-intensity interval training (HIIT) or moderate-intensity continuous training (MICT) alone has been shown to improve metabolic health, but the effects of alternating the two training approaches as often practiced in real life remained unclear. The purpose of the current study was to examine the effects of HIIT or MICT alone or alternating HIIT-MICT on cardiometabolic responses in inactive obese middle-aged men.MethodsForty-two participants (age: 42 ± 5 y; BMI: 26.3 ± 2.1 kg m−2) were randomly assigned to four groups: HIIT (12 x 1-min running bouts at 80–90% HRmaxinterspersed with 1-min active recovery at 50% HRmax), MICT (40-min brisk walk at 65–70% HRmax), alternating HIIT-MICT or a non-exercise control group (CON). Exercise sessions were conducted three times per week for 16 weeks. Maximal oxygen uptake (VO2max), body composition (by bioelectrical impedance analysis), blood pressure, fasting blood glucose, insulin resistance (HOMA-IR) and lipid profile were assessed at baseline and after the 16-week intervention. Enjoyment and self-efficacy were also assessed at the end of intervention.ResultsAll exercise groups showed a similar VO2maxincrease of ∼15% (HIIT: 34.3 ± 4.4 vs 39.1 ± 5.4; MICT: 34.9 ± 5.0 vs 39.4 ± 7.2; and alternating HIIT-MICT: 34.4 ± 5.0 vs 40.3 ± 4.6 mL kg−1min−1) compared to baseline and CON (all p < 0.05). Weight, BMI, % fat and waist circumference also showed similar reductions in all exercise groups compared to baseline and CON (all p < 0.05). No significant group difference was observed for all blood markers. Compared to baseline, total cholesterol decreased after HIIT-MICT, while HIIT significantly decreased fasting insulin level and improved insulin resistance (p < 0.05). Enjoyment, self-efficacy and adherence were similar among all exercise groups.ConclusionHIIT or MICT alone or alternating HIIT-MICT similarly improve cardiovascular fitness and body composition in obese middle-aged men despite differences in total training volume and time commitment.
关键词：KeywordsenHIITInterval exerciseContinuous trainingWeight managementPublic health