Acute Responses to High-Intensity Intermittent Exercise in CHD Patients
Thibaut Guiraud1, Anil Nigam, Martin Juneau
1Montreal Heart Institute, Cardiovascular Prevention Centre (Centre ÉPIC), University de Montreal, Montreal, CANADA.
Medicine and Science in Sports and Exercise
|June 15, 2010
Summary
High-intensity interval exercise (HIIE) was well tolerated and preferred by patients with coronary heart disease (CHD) over moderate-intensity continuous exercise (MICE). HIIE demonstrated greater efficiency and lower perceived exertion without causing myocardial injury.
Area of Science:
- Cardiology
- Exercise Physiology
- Sports Medicine
Background:
- Limited research exists on high-intensity intermittent exercise (HIIE) responses in coronary heart disease (CHD) patients.
- Physiological responses to continuous exercise are documented, but HIIE remains understudied in this population.
Purpose of the Study:
- To compare physiological responses between HIIE and moderate-intensity continuous exercise (MICE) in stable CHD patients.
- To assess the safety and tolerability of HIIE in individuals with CHD.
Main Methods:
- Twenty stable CHD patients (19 males, 1 female, 62 ± 11 years) participated in a randomized crossover study.
- Patients underwent HIIE (15s at 100% peak power output, 15s passive recovery) and isocaloric MICE (70% peak power output).
- Energy expenditure was matched between protocols.
Main Results:
- Both HIIE and MICE protocols exhibited equivalent energy expenditure.
- HIIE resulted in lower mean ventilation and was preferred by participants due to lower perceived exertion (Borg scale).
- No exercise-induced myocardial injury was detected, as evidenced by normal serum troponin T levels post-exercise.
Conclusions:
- HIIE is a well-tolerated and potentially more efficient exercise modality for stable CHD patients compared to MICE.
- The findings support the consideration of HIIE protocols in cardiac rehabilitation programs for selected CHD patients.
- HIIE offers a safe alternative with improved patient adherence due to reduced perceived exertion.
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