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Related Experiment Video

Updated: Dec 29, 2025

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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Interval exercise induces milder respiratory responses compared to continuous exercise.

Pierros Thomakos1, Nikolaos Geladas1, Vassilis Paschalis1

  • 1Department of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece.

Journal of Sports Sciences
|January 30, 2020
PubMed
Summary
This summary is machine-generated.

Continuous exercise stimulates respiration more than interval exercise at the same relative intensity. This study compared the respiratory responses of continuous exercise (CE) and interval exercise (IE) in athletes.

Keywords:
Intermittent exercisemouth occlusion pressureventilation

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Area of Science:

  • Exercise Physiology
  • Respiratory Physiology

Background:

  • Understanding the physiological demands of different exercise modalities is crucial for optimizing training.
  • Acute interval exercise (IE) and continuous exercise (CE) elicit distinct physiological responses.

Purpose of the Study:

  • To compare the respiratory responses to acute interval exercise (IE) and continuous exercise (CE).
  • To investigate the effects of low and high intensities on respiratory parameters during IE and CE.

Main Methods:

  • Fourteen recreational athletes (7 male, 7 female) with a mean VO2max of 35.7 ± 6.1 mlkg-1min-1 participated.
  • Participants completed both continuous and interval exercise bouts at low and high intensities, matched for relative effort.
  • Respiratory parameters including heart rate, ventilation, and mouth occlusion pressure (P0.1) were measured.

Main Results:

  • Continuous exercise (CE) induced significantly higher heart rate and ventilation compared to interval exercise (IE) at both low and high intensities.
  • Mouth occlusion pressure (P0.1), an indicator of respiratory drive, was also significantly higher during CE versus IE.
  • These differences were statistically significant (P < 0.05).

Conclusions:

  • Continuous exercise stimulates the respiratory system more intensely than interval exercise when performed at the same relative intensity.
  • The findings suggest that exercise intensity prescription should consider the modality (continuous vs. interval) to achieve desired respiratory adaptations.