☆ 4.6 Article

High-Intensity Interval Training in Cardiac Rehabilitation: Impact on Fat Mass in Patients With Myocardial Infarction

MAYO CLINIC PROCEEDINGS (2019)

Journal

MAYO CLINIC PROCEEDINGS

Volume 94, Issue 9, Pages 1718-1730

Publisher

ELSEVIER SCIENCE INC

DOI: 10.1016/j.mayocp.2019.04.033

Keywords

Funding

US National Institutes of Health [HL-126638]
Hunan Development and Reform Commission Foundation of China [[2012] 1521]

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Abstract

Objective: To examine the effect of high-intensity interval training (HIIT) on body fat mass and distribution in patients with myocardial infarction (MI) who underwent cardiac rehabilitation (CR). Patients and Methods: We retrospectively screened 391 consecutive patients with MI enrolled in CR between September 1, 2015, and February 28, 2018. We included 120 patients who completed 36 CR sessions and underwent pretest-posttest dual-energy x-ray absorptiometry; 90 engaged in HIIT, and 30 engaged in moderate-intensity continuous training (MICT). High-intensity interval training included 4 to 8 alternating intervals of high- (30-60 seconds at a rating of perceived exertion [RPE] of 15-17 [Borg scale range, 6-20]) and low-intensity (1-5 minutes at RPE <14), and MICT performed for 20 to 45 minutes of exercise at an RPE of 12 to 14. Body weight, fat mass, and lean mass were measured via dual-energy x-ray absorptiometry with lipid profile measured via clinical procedures. Results: The HIIT and MICT groups were similar in age (67 vs 67 years), sex (26.7% [24 of 90 patients in the HIIT group] vs 26.7% [8 of 30 in the MICT group), and body mass index (30.3 vs 29.5 kg/m(2)) at baseline. The HIIT group had greater reductions in body fat percentage (P<.001), fat mass (P<.001), abdominal fat percentage (P<.001), waist circumference (P=.01), total cholesterol (P=.002), low-density lipoprotein cholesterol (P<.001), and triglycerides (P=.006). Improvements in total body mass and body mass index were not different across groups. After matching exercise duration, exercise intensity, and energy expenditure, HIIT-induced improvements in total fat mass (P=.02), body fat percentage (P=.01), and abdominal fat percentage (P=.02) persisted. Conclusion: Our data suggest that supervised HIIT results in significant reductions in total fat mass (P<.001) and abdominal fat percentage (P<.001) and improved lipid profile in patients with MI who undergo CR. (C) 2019 Mayo Foundation for Medical Education and Research

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Cardiorespiratory Responses During High-Intensity Interval Training Prescribed by Rating of Perceived Exertion in Patients After Myocardial Infarction Enrolled in Early Outpatient Cardiac Rehabilitation

Yaoshan Dun, Shane M. Hammer, Joshua R. Smith, Mary C. MacGillivray, Benjamin S. Simmons, Ray W. Squires, Suixin Liu, Thomas P. Olson

Summary: This study aimed to investigate the cardiorespiratory responses and adaptations of myocardial infarction (MI) patients during early outpatient cardiac rehabilitation (CR) when high-intensity interval training (HIIT) was prescribed using ratings of perceived exertion (RPE). The results showed that RPE-prescribed HIIT effectively increased exercise workload and oxygen uptake (VO2) without causing excessive perception of effort, heart rate, or blood pressure in MI patients during early outpatient CR.

FRONTIERS IN CARDIOVASCULAR MEDICINE (2022)