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Impact of High-intensity Interval Exercise and Moderate-Intensity Continuous Exercise on the Cardiac Troponin T Level at an Early Stage of Training

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Psychological and Behavioral Responses to Interval and Continuous Exercise.

Matthew J Stork¹, Martin J Gibala², Kathleen A Martin Ginis^1,3

¹School of Health and Exercise Sciences, University of British Columbia, Kelowna, BC, CANADA.

Medicine and Science in Sports and Exercise

|May 18, 2018

Summary

High-intensity interval training (HIIT) and sprint interval training (SIT) are as enjoyable and preferred as moderate-intensity continuous training (MICT) for inactive adults. Affective responses during exercise predict enjoyment and preferences, influencing subsequent exercise behavior.

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Area of Science:

Exercise Physiology
Sports Psychology
Behavioral Science

Background:

Understanding psychological responses to different exercise intensities is crucial for promoting adherence in inactive populations.
Moderate-intensity continuous training (MICT), high-intensity interval training (HIIT), and sprint interval training (SIT) represent distinct exercise modalities.
Limited research compares the psychological impact and preference for these training types among exercise-naïve adults.

Purpose of the Study:

To compare psychological responses and preferences for MICT, HIIT, and SIT in inactive adults.
To examine the relationship between affect, enjoyment, exercise preferences, and subsequent exercise behavior over a 4-week period.

Main Methods:

Thirty inactive adults (mean age 21.23 ± 3.81 years) completed randomized cycle ergometer trials of MICT, HIIT, and SIT.
Measurements included rating of perceived exertion (RPE), affect, arousal during exercise, and post-exercise enjoyment.
Participants ranked exercise protocols by preference and self-reported exercise adherence over a 4-week follow-up.

Main Results:

Enjoyment and preferences were similar across MICT, HIIT, and SIT, despite higher physiological strain during interval training.
In-task affect positively predicted post-exercise enjoyment and subsequent preferences for HIIT and SIT.
Participants completed significantly more MICT sessions (6.11 ± 4.12) than SIT sessions (1.39 ± 1.85) over the follow-up period.

Conclusions:

A single session of HIIT and SIT can be as enjoyable and preferable as MICT for inactive individuals.
Affective responses during exercise are key predictors of enjoyment and preference, particularly for interval training.
Differences exist in the exercise affect-behavior relationship between continuous and interval exercise, potentially impacting long-term adherence.