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Journal Article Randomized Controlled Trial Research Support, Non-U.S. Gov't Ppublish 6 citations

PubMed: 34793361 DOI: 10.1097/HCR.0000000000000607

Chronotropic Responses to Exercise and Recovery in Myocardial Infarction Patients Taking β-Blockers Following Aerobic High-Intensity Interval Training: AN INTERFARCT STUDY.

J Cardiopulm Rehabil Prev 42(1):22-27

Authors: Jon Ander Jayo-Montoya, Borja Jurio-Iriarte, G Rodrigo Aispuru, Beatriz Villar-Zabala, Sonia Blanco-Guzman, Sara Maldonado-Martín

Affiliations

  • GIzartea, Kirola eta Ariketa Fisikoa Ikerkuntza Taldea (GIKAFIT), Society, Sports, and Physical Exercise Research Group, Department of Physical Education and Sport, Physical Activity and Sport Sciences Section of the Faculty of Education and Sport, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Araba/Álava, Basque Country, Spain (Mr Jayo-Montoya and Drs Jurio-Iriarte and Maldonado-Martín); Primary Care Administration of Burgos, Health Service of the Castile & Leon Community, Sacyl, Spain (Dr Aispuru and Ms Villar-Zabala); Internal Medicine Department, Santiago Apóstol Hospital, Miranda de Ebro, Burgos, Spain (Dr Blanco-Guzman); and Bioaraba, Physical Activity, Exercise and Health, Vitoria-Gasteiz, Basque Country, Spain (Dr Maldonado-Martín).

Abstract

PURPOSE

The objectives of this study were to compare the effects of two different high-intensity interval training (HIIT) programs (low-volume vs high-volume) on chronotropic responses during exercise and recovery, and to contrast the results of the HIIT groups together to only physical activity recommendations in post-myocardial infarction (MI) patients taking β-blockers.

METHODS

Resting heart rate (HRrest), peak HR (HRpeak), HR reserve (HRreserve = HRpeak-HRrest), HR recovery (HRR) as the difference between HRpeak and post-exercise HR, and chronotropic incompetence were assessed in 70 patients (58 ± 8 yr) following MI with a cardiopulmonary exercise test to peak exertion before and after a 16-wk exercise intervention period. All participants were randomized to either attention control (AC) (physical activity recommendations) or one of the two supervised HIIT groups (2 d/wk).

RESULTS

After the intervention, no significant between-HIIT group differences were observed. The HRpeak increased (P < .05) in low- (Δ= 8 ± 18%) and high-volume HIIT (Δ= 6 ± 9%), with a small decrease in AC (Δ=- 2 ± 12%, P > .05) resulting in large differences (P < .05) between HIIT and AC. The HRreserve increased (P < .05) in high-volume HIIT. The HRR slightly increased (P < .05) in low-volume (5th min, Δ= 19 ± 31%) and high-volume HIIT (2nd min, Δ= 15 ± 29%, and 5th min, Δ= 19 ± 28%).

CONCLUSION

These findings suggest that both low- and high-volume HIIT elicit similar improvements in chronotropic responses after MI, independent of β-blocker treatment. Supervised HIIT was more effective than giving physical activity recommendations alone. Low-volume HIIT is presented as a potent and time-efficient exercise strategy that could enhance the sympathovagal balance in this population.

MeSH

Myocardial Infarction, Exercise, Recycling, Cardiac Rehabilitation, High-Intensity Interval Training

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