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Area of Science:

  • Exercise Physiology
  • Sports Psychology

Background:

  • Understanding psychological responses to different exercise intensities is crucial for adherence.
  • Continuous training (CT) and high-intensity interval training (HIT) are common exercise modalities with distinct physiological demands.

Purpose of the Study:

  • To compare the psychological responses between continuous training (CT) and high-intensity interval training (HIT) sessions.
  • To investigate the influence of exercise intensity and metabolic pathways on psychological outcomes.

Main Methods:

  • Fifteen men completed randomized CT and HIT sessions at intensities matched below the respiratory compensation point (RCP).
  • Psychological variables (feeling scale, felt arousal, rating of perceived exertion, Profile of Mood States, physical activity enjoyment scale) and physiological measures (VO2Peak, RCP) were recorded.
  • Session intensity was standardized to 15% below RCP, with HIT at 100% VO2Peak.

Main Results:

  • No significant difference in average VO2 percentage between HIT (73.3%) and CT (71.8%).
  • HIT resulted in lower feeling scale scores (more negative affect) and higher felt arousal and rating of perceived exertion.
  • Despite greater fatigue post-HIT, the physical activity enjoyment scale did not differ significantly between conditions.

Conclusions:

  • HIT, despite matched average intensity, elicits more negative psychological responses compared to CT.
  • The increased reliance on anaerobic metabolism during HIT appears to negatively impact affective responses.
  • Exercise adherence may be influenced by these differential psychological responses to training modalities.