The Impact of Interval Training on Cardiorespiratory Fitness, Body Composition, Physical Fitness, and Metabolic Parameters in Older Adults: a Systematic Review and Meta-Analysis [post]

2020 unpublished
This review and meta-analysis aimed to evaluate the effects of high-intensity interval training (HIIT) on cardiorespiratory tness, body composition, physical tness, and health-related outcomes in older adults. Methods: Four electronic databases (PubMed, Scopus, Medline, and Web of Science) were searched (until Oct 2019) for randomized trials comparing the effect of HIIT on physical tness, metabolic parameters, and cardiorespiratory tness in older adults. The Cochrane risk of bias assessment
more » ... bias assessment tool was used to evaluate the methodological quality of the included studies; Stata 14.0 software was used for statistical analysis. Results: HIIT signi cantly improved the maximum rate of oxygen consumption (VO 2max ) compared with a moderate-intensity continuous training (MICT) protocol (HIIT vs. MICT: weighted mean difference = 2.04, 95% con dence interval: 1.01-3.07, p < 0.001). Additional subgroup analyses determined that training periods > 12 wks, training frequencies of 2 sessions/wk, session lengths of 40 min, 6 sets and repetitions, training times per repetition of > 60 s, and rest times of < 90 s are more effective for VO 2max . Conclusions:This systematic review and meta-analysis showed that HIIT induces favorable adaptions in cardiorespiratory tness, physical tness, muscle power, cardiac contractile function, and citrate synthase activities in older individuals which may help to maintain aerobic tness and slow down the process of sarcopenia.
doi:10.21203/rs.2.23869/v1 fatcat:to3ubjq2d5ca7mazzwlybykpxi