TY - JOUR
T1 - Cardiorespiratory Responses During High-Intensity Interval Training Prescribed by Rating of Perceived Exertion in Patients After Myocardial Infarction Enrolled in Early Outpatient Cardiac Rehabilitation
AU - Dun, Yaoshan
AU - Hammer, Shane M.
AU - Smith, Joshua R.
AU - MacGillivray, Mary C.
AU - Simmons, Benjamin S.
AU - Squires, Ray W.
AU - Liu, Suixin
AU - Olson, Thomas P.
N1 - Publisher Copyright:
Copyright © 2022 Dun, Hammer, Smith, MacGillivray, Simmons, Squires, Liu and Olson.
PY - 2021
Y1 - 2021
N2 - Objective: We aimed to determine the cardiorespiratory responses during, and adaptations to, high-intensity interval training (HIIT) prescribed using ratings of perceived exertion (RPE) in patients after myocardial infarction (MI) during early outpatient cardiac rehabilitation (CR). Methods: We prospectively recruited 29 MI patients after percutaneous coronary intervention who began CR within 2 weeks after hospital discharge. Eleven patients (seven men; four women; age: 61 ± 11 yrs) who completed ≥24 supervised HIIT sessions with metabolic gas exchange measured during HIIT once weekly for 8 weeks and performed pre- and post- CR cardiopulmonary exercise tests were included in the study. Each HIIT session consisted of 5–8 high-intensity intervals [HIIs, 1-min RPE 14–17 (Borg 6–20 scale)] and low-intensity intervals (LIIs, 4-min RPE < 12). Metabolic gas exchange, heart rate (HR), and blood pressure during HIIT were measured. Results: The mean oxygen uptake ( (Formula presented.) 2) during HIIs across 88 sessions of HIITs [91 (14)% of (Formula presented.) 2peak, median (interquartile range, IQR)] was significantly higher than the lower limit of target (Formula presented.) 2 zone (75% of (Formula presented.) 2peak) recommended for the HII (p < 0.001). Exercise intensity during RPE-prescribed HIITs, determined as % (Formula presented.) 2peak, was highly repeatable with intra-class correlations of 0.95 (95% CI 0.86– 0.99, p < 0.001). For cardiorespiratory adaptations from the first to the last session of HIIT, treadmill speed, treadmill grade, treadmill power, (Formula presented.) 2HII, % (Formula presented.) 2peak, and VE during HIIs were increased (all p < 0.05), while no difference was found for HR, %HRpeak and systolic blood pressure (all p > 0.05). (Formula presented.) 2peak increased by an average of 9% from pre-CR to post-CR. No adverse events occurred. Conclusion: Our results demonstrate that HIIT can be effectively prescribed using RPE in MI patients during early outpatient CR. Participation in RPE-prescribed HIIT increases exercise workload and (Formula presented.) 2 during exercise training without increased perception of effort or excessive increases in heart rate or blood pressure.
AB - Objective: We aimed to determine the cardiorespiratory responses during, and adaptations to, high-intensity interval training (HIIT) prescribed using ratings of perceived exertion (RPE) in patients after myocardial infarction (MI) during early outpatient cardiac rehabilitation (CR). Methods: We prospectively recruited 29 MI patients after percutaneous coronary intervention who began CR within 2 weeks after hospital discharge. Eleven patients (seven men; four women; age: 61 ± 11 yrs) who completed ≥24 supervised HIIT sessions with metabolic gas exchange measured during HIIT once weekly for 8 weeks and performed pre- and post- CR cardiopulmonary exercise tests were included in the study. Each HIIT session consisted of 5–8 high-intensity intervals [HIIs, 1-min RPE 14–17 (Borg 6–20 scale)] and low-intensity intervals (LIIs, 4-min RPE < 12). Metabolic gas exchange, heart rate (HR), and blood pressure during HIIT were measured. Results: The mean oxygen uptake ( (Formula presented.) 2) during HIIs across 88 sessions of HIITs [91 (14)% of (Formula presented.) 2peak, median (interquartile range, IQR)] was significantly higher than the lower limit of target (Formula presented.) 2 zone (75% of (Formula presented.) 2peak) recommended for the HII (p < 0.001). Exercise intensity during RPE-prescribed HIITs, determined as % (Formula presented.) 2peak, was highly repeatable with intra-class correlations of 0.95 (95% CI 0.86– 0.99, p < 0.001). For cardiorespiratory adaptations from the first to the last session of HIIT, treadmill speed, treadmill grade, treadmill power, (Formula presented.) 2HII, % (Formula presented.) 2peak, and VE during HIIs were increased (all p < 0.05), while no difference was found for HR, %HRpeak and systolic blood pressure (all p > 0.05). (Formula presented.) 2peak increased by an average of 9% from pre-CR to post-CR. No adverse events occurred. Conclusion: Our results demonstrate that HIIT can be effectively prescribed using RPE in MI patients during early outpatient CR. Participation in RPE-prescribed HIIT increases exercise workload and (Formula presented.) 2 during exercise training without increased perception of effort or excessive increases in heart rate or blood pressure.
KW - cardiac rehabilitation
KW - high-intensity interval training
KW - metabolic gas exchange
KW - myocardial infarction
KW - rating of perceived exertion
UR - http://www.scopus.com/inward/record.url?scp=85174171467&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85174171467&partnerID=8YFLogxK
U2 - 10.3389/fcvm.2021.772815
DO - 10.3389/fcvm.2021.772815
M3 - Article
AN - SCOPUS:85174171467
SN - 2297-055X
VL - 8
JO - Frontiers in Cardiovascular Medicine
JF - Frontiers in Cardiovascular Medicine
M1 - 772815
ER -