Variability in Intensity Related to Increased Overall Bout Intensity
Brittany S Overstreet1, Kelley Strohacker2
1Department of Kinesiology and Applied Physiology, University of Delaware, Newark, DE.
American Journal of Health Behavior
|February 21, 2018
Summary
Varying exercise intensity during a workout, measured by metabolic equivalent standard deviation (METSD), positively impacts overall exercise intensity. Encouraging intra-bout variety may increase exercise dose while preserving autonomy.
Area of Science:
- Exercise Physiology
- Behavioral Science
Background:
- Self-regulated exercise allows individuals to control intensity.
- Understanding factors influencing exercise intensity is crucial for adherence and effectiveness.
Purpose of the Study:
- To investigate the relationship between variability in self-regulated exercise intensity and overall exercise intensity.
- To identify predictors of overall exercise intensity during a self-regulated bout.
Main Methods:
- 32 participants completed a 30-minute self-regulated treadmill exercise session.
- Participants adjusted speed and incline every 5 minutes, blinded to treadmill settings.
- Exercise intensity variability was quantified using metabolic equivalent standard deviation (METSD).
Main Results:
- METSD was positively correlated with and significantly predicted overall exercise intensity.
- METSD and VO2peak predicted overall intensity when accounting for physiological variables.
- Tolerance for exercise intensity emerged as a significant predictor alongside METSD when controlling for physiological and psychological variables.
Conclusions:
- In-task variability in exercise intensity is positively associated with the average intensity of the exercise bout.
- Future research should explore encouraging intra-bout exercise intensity variety to potentially increase exercise dose and maintain autonomy.
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