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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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High-Intensity Interval or Continuous Moderate Exercise: A 24-Week Pilot Trial.

Sean R Locke¹, Jessica E Bourne¹, Mark R Beauchamp²

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

Medicine and Science in Sports and Exercise

|May 16, 2018

Summary

This summary is machine-generated.

High-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) both increased physical activity in individuals at high risk for type 2 diabetes (T2D). This pilot study found HIIT led to greater increases in moderate-to-vigorous physical activity (MVPA) over 24 weeks.

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Area of Science:

Exercise Physiology
Cardiometabolic Health
Behavioral Science

Background:

High-intensity interval training (HIIT) may offer superior cardiometabolic benefits over moderate-intensity continuous training (MICT).
Adherence to HIIT programs, particularly in at-risk populations, requires further investigation.
Understanding physical activity adherence is crucial for long-term health management.

Purpose of the Study:

To examine moderate-to-vigorous physical activity (MVPA) adherence 24 weeks post-intervention.
To compare adherence between HIIT and MICT when combined with brief counseling.
To assess the feasibility of HIIT for individuals at high risk of type 2 diabetes (T2D).

Main Methods:

Randomized pilot study comparing HIIT (n=15) and MICT (n=17) in individuals at high risk for T2D.
Intervention included 10 exercise sessions and brief counseling over 2 weeks.
Objective measures of MVPA (accelerometry) and cardiorespiratory fitness (V˙O2peak) were assessed at baseline and 24 weeks.

Main Results:

HIIT group increased MVPA by 53 min at 24 weeks (Cohen's d = 1.52), compared to 19 min in the MICT group.
Both groups showed modest increases in V˙O2peak.
Self-regulatory and task self-efficacy improved post-intervention but declined similarly at 24 weeks in both groups.

Conclusions:

A brief intervention combining exercise (HIIT or MICT) and counseling successfully increased and maintained free-living MVPA for 24 weeks in individuals at high risk for T2D.
The notion that HIIT is unsuitable for overweight individuals at high risk for T2D may be unfounded.
HIIT appears to be a viable option for improving physical activity in this population.