Sean R Locke1, Jessica E Bourne1, Mark R Beauchamp2, Jonathan P Little1, Julianne Barry1, Joel Singer3, Mary E Jung1. 1. School of Health and Exercise Sciences, University of British Columbia, Okanagan Campus, Kelowna, BC, CANADA. 2. School of Kinesiology, University of British Columbia, Vancouver, BC, CANADA. 3. School of Population and Public Health, University of British Columbia, Vancouver, BC, CANADA.
Abstract
PURPOSE:High-intensity interval training (HIIT) may lead to superior cardiometabolic improvements when compared with moderate-intensity continuous training (MICT). However, adherence to HIIT requires examination. The purpose of this pilot study was to examine moderate-to-vigorous physical activity (MVPA) adherence 24 wk after a brief counseling intervention combined with either HIIT or MICT. METHODS:Individuals at high risk of type 2 diabetes (T2D) were randomized to HIIT (n = 15) or MICT (n = 17) and completed 10 exercise sessions accompanied by a brief 10-min counseling intervention over a 2-wk period. Objectively measured purposeful MVPA (accelerometry) and cardiorespiratory fitness (V˙O2peak) were assessed at baseline and 24 wk postintervention. Self-regulatory efficacy and task self-efficacy were examined at baseline, postintervention, and 24 wk postintervention. Using an intention-to-treat analysis, change scores were calculated for HIIT and MICT and compared between groups. RESULTS: Individuals assigned to HIIT increased their MVPA by 53 min (Cohen's d = 1.52) at 24 wk compared with 19 min in MICT. Both HIIT and MICT increased relative V˙O2peak by 2 and 1 mL·kg·min, respectively. Participants in both groups increased in their self-regulatory and task self-efficacy postintervention, but both groups demonstrated similar decline at 24 wk. CONCLUSION: This pilot intervention was successful in increasing, and maintaining, free-living MVPA over a 24-wk period in individuals at high risk of T2D. Speculation that HIIT is inappropriate or unattainable for overweight individuals at high risk of T2D may be unfounded.
RCT Entities:
PURPOSE: High-intensity interval training (HIIT) may lead to superior cardiometabolic improvements when compared with moderate-intensity continuous training (MICT). However, adherence to HIIT requires examination. The purpose of this pilot study was to examine moderate-to-vigorous physical activity (MVPA) adherence 24 wk after a brief counseling intervention combined with either HIIT or MICT. METHODS: Individuals at high risk of type 2 diabetes (T2D) were randomized to HIIT (n = 15) or MICT (n = 17) and completed 10 exercise sessions accompanied by a brief 10-min counseling intervention over a 2-wk period. Objectively measured purposeful MVPA (accelerometry) and cardiorespiratory fitness (V˙O2peak) were assessed at baseline and 24 wk postintervention. Self-regulatory efficacy and task self-efficacy were examined at baseline, postintervention, and 24 wk postintervention. Using an intention-to-treat analysis, change scores were calculated for HIIT and MICT and compared between groups. RESULTS: Individuals assigned to HIIT increased their MVPA by 53 min (Cohen's d = 1.52) at 24 wk compared with 19 min in MICT. Both HIIT and MICT increased relative V˙O2peak by 2 and 1 mL·kg·min, respectively. Participants in both groups increased in their self-regulatory and task self-efficacy postintervention, but both groups demonstrated similar decline at 24 wk. CONCLUSION: This pilot intervention was successful in increasing, and maintaining, free-living MVPA over a 24-wk period in individuals at high risk of T2D. Speculation that HIIT is inappropriate or unattainable for overweight individuals at high risk of T2D may be unfounded.
Authors: Megan M MacPherson; Kaela D Cranston; Sean R Locke; Jessica E Bourne; Mary E Jung Journal: Transl Behav Med Date: 2021-08-13 Impact factor: 3.046
Authors: M E Jung; S R Locke; J E Bourne; M R Beauchamp; T Lee; J Singer; M MacPherson; J Barry; C Jones; J P Little Journal: Int J Behav Nutr Phys Act Date: 2020-02-26 Impact factor: 6.457
Authors: Yang Yan-Guang; Chen Jing-Yi; Pang Xiao-Wu; Shen Meng-Lu; Yang Su-Yong; Xu Ding; Xiao Ke; Wang Tian-Yuan; Wang Jia-Bin; Zhu Dong Journal: BMC Sports Sci Med Rehabil Date: 2021-01-21