Objective To investigate the effects of high-intensity interval training (HIIT) and sprint interval training (SIT) on fat oxidation during exercise (FatOx) and how they compare with the effects of moderate-intensity continuous training (MICT). Design Systematic review and meta-analysis. Data sources Academic Search Ultimate, CINAHL, Networked Digital Library of Theses and Dissertations, Open Access Theses and Dissertations, OpenDissertations, PubMed/MEDLINE, Scopus, SPORTDiscus and Web of Science. Eligibility criteria for selecting studies Studies using a between-group design, involving adult participants who were not trained athletes, and evaluating effects of HIIT or SIT on FatOx (vs no exercise or MICT) were included. Results Eighteen studies of fair-to-good quality were included; nine comparing HIIT or SIT with no exercise and eleven comparing HIIT or SIT with MICT. A significant pooled effect of these types of interval training on FatOx was found (mean difference in g/min (MD)=0.08; 95% confidence interval (CI) 0.04 to 0.12; p <0.001). Significant effects were found for exercise regimens lasting ≥4 weeks, and they increased with every additional week of training ( β =0.01; 95% CI 0.00 to 0.02; p =0.003). HIIT and/or SIT were slightly more effective than MICT (MD=0.03; 95% CI 0.01 to 0.05; p =0.005). The effects on FatOx were larger among individuals with overweight/obesity. Conclusion Engaging in HIIT or SIT can improve FatOx, with larger effects expected for longer training regimens and individuals with overweight/obesity. While some effects seem small, they may be important in holistic approaches to enhance metabolic health and manage obesity.

中文翻译：

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高强度间歇训练（HIIT）和冲刺间歇训练（SIT）对运动过程中脂肪氧化的影响：系统评价和荟萃分析


目的 探讨高强度间歇训练（HIIT）和冲刺间歇训练（SIT）对运动过程中脂肪氧化（FatOx）的影响，并与中等强度持续训练（MICT）的效果进行比较。设计系统回顾和荟萃分析。数据来源：Academic Search Ultimate、CINAHL、网络学位论文数字图书馆、开放获取学位论文、OpenDissertations、PubMed/MEDLINE、Scopus、SPORTDiscus 和 Web of Science。选择研究的资格标准包括采用组间设计的研究，涉及未受过训练的成年参与者，并评估 HIIT 或 SIT 对 FatOx 的影响（与不运动或 MICT 相比）。结果 纳入了 18 项质量中等至良好的研究； 9 名将 HIIT 或 SIT 与无运动进行比较，11 名将 HIIT 或 SIT 与 MICT 进行比较。发现这些类型的间歇训练对 FatOx 具有显着的综合效应（平均差异 g/min (MD)=0.08；95% 置信区间 (CI) 0.04 至 0.12；p <0.001）。持续≥4周的运动方案有显着效果，并且每增加一周训练效果就会增加（β = 0.01；95% CI 0.00至0.02；p = 0.003）。 HIIT 和/或 SIT 比 MICT 稍有效（MD=0.03；95% CI 0.01 至 0.05；p =0.005）。超重/肥胖人群对 FatOx 的影响更大。结论 参加 HIIT 或 SIT 可以改善 FatOx，对于较长的训练方案和超重/肥胖的个体来说，预计效果会更大。虽然有些影响看起来很小，但它们对于增强代谢健康和控制肥胖的整体方法可能很重要。