학술논문
High-Intensity Interval Training Improves Cognitive Flexibility in Older Adults
Article
Article
Document Type
Report
Author
Source
Brain Sciences. November 2020, Vol. 10 Issue 11, p1ah, 12 p.
Subject
Language
English
ISSN
2076-3425
Abstract
1. Introduction Advancing age is associated with a decline in higher order cognitive processes [1] known as executive functions (EFs), which are responsible for updating, shifting, and inhibiting cognitive actions [...]
Introduction: Regular aerobic exercise is associated with better executive function in older adults.It is unclearifhigh-intensity-interval-training (HIIT) elicits moderate-intensity continuous training (MICT) or resistance training (RT). We hypothesized that HIIT would augment executive function more than MICT and RT. Methods: Sixty-nine older adults (age: 68 [+ or -] 7 years) performed six weeks (three days/week) of HIIT (2 * 20 min bouts alternating between 15 s intervals at 100% of peak power output (PPO) and passive recovery (0% PPO); n = 24), MICT (34 min at 60% PPO; n = 19), or whole-body RT (eight exercise superior improvements in executive function of older adults than moderate-intensity-continuous-training, 2 * 10 repetitions; n = 26). Cardiorespiratory fitness (i.e., [VO.sub.2max]) and executive function were assessed before and after each intervention via a progressive maximal cycle ergometer protocol and the Stroop Task, respectively. Results: The [VO.sub.2max] findings revealed a significant group by time interaction (p = 0.001) in which all groups improved following training, but HIIT and MICT improved more than RT. From pre- to post-training, no interaction in the naming condition of the Stroop Task was observed (p > 0.10). However, interaction from pre-to post-training by group was observed, and only the HIIT group exhibited a faster reaction time (from 1250 [+ or -] 50 to 1100 [+ or -] 50 ms; p < 0.001) in switching (cognitive flexibility). Conclusion: Despite similar improvements in cardiorespiratory fitness, HIIT, but not MICT nor RT, enhanced cognitive flexibility in older adults. Exercise programs should consider using HIIT protocols in an effort to combat cognitive decline in older adults. Keywords: aging; exercise intensity; cognition; brain health; cardiorespiratory fitness
Introduction: Regular aerobic exercise is associated with better executive function in older adults.It is unclearifhigh-intensity-interval-training (HIIT) elicits moderate-intensity continuous training (MICT) or resistance training (RT). We hypothesized that HIIT would augment executive function more than MICT and RT. Methods: Sixty-nine older adults (age: 68 [+ or -] 7 years) performed six weeks (three days/week) of HIIT (2 * 20 min bouts alternating between 15 s intervals at 100% of peak power output (PPO) and passive recovery (0% PPO); n = 24), MICT (34 min at 60% PPO; n = 19), or whole-body RT (eight exercise superior improvements in executive function of older adults than moderate-intensity-continuous-training, 2 * 10 repetitions; n = 26). Cardiorespiratory fitness (i.e., [VO.sub.2max]) and executive function were assessed before and after each intervention via a progressive maximal cycle ergometer protocol and the Stroop Task, respectively. Results: The [VO.sub.2max] findings revealed a significant group by time interaction (p = 0.001) in which all groups improved following training, but HIIT and MICT improved more than RT. From pre- to post-training, no interaction in the naming condition of the Stroop Task was observed (p > 0.10). However, interaction from pre-to post-training by group was observed, and only the HIIT group exhibited a faster reaction time (from 1250 [+ or -] 50 to 1100 [+ or -] 50 ms; p < 0.001) in switching (cognitive flexibility). Conclusion: Despite similar improvements in cardiorespiratory fitness, HIIT, but not MICT nor RT, enhanced cognitive flexibility in older adults. Exercise programs should consider using HIIT protocols in an effort to combat cognitive decline in older adults. Keywords: aging; exercise intensity; cognition; brain health; cardiorespiratory fitness