Effect of Interval Training for 12 Weeks on Diastolic Filling of Left Ventricle During Mild Exercise

Motohiko Miyachi, Sho Onodera, Tsuyoshi Itoh, Hisaya Arimura

Research output: Contribution to journalArticlepeer-review

Abstract

To clarify the mechanism responsible for the increase in stroke volume (SV) due to training, we investigated the effects of interval training on the left ventricle using M-mode echocardiography. Six healthy male subjects volunteered to undergo 48 training sessions for 12 weeks (4 sessions* week −1). One session consisted of five periods of exercise of 3-min duration on a cycle ergometer at a power output of 100% maximal O2 uptake (Vo2max), interspersed with 2-min recovery cycling at 50% Vo2max. The echocardiograms at rest and during mild exercise (100 W) were recorded before and after the training. The interval training significantly increased Vo2max. Although there was no significant difference in SV at rest before and after the training, the training increased SV significantly during exercise. Before the training, there was a significant difference in left ventricular end-diastolic dimension (LVEDD) and left ventricular end-diastolic volume (LVEDV) at rest and during exercise. However, after the training, LVEDD and LVEDV during exercise were significantly larger than those at rest. These results suggest that interval training for 12 weeks increases diastolic filling (elasticity) of the left ventricle during exercise in healthy young men, partly contributing to the increase in SV due to the training.

Original languageEnglish
Pages (from-to)541-546
Number of pages6
Journaljapanese journal of physical fitness and sports medicine
Volume44
Issue number5
DOIs
Publication statusPublished - 1995
Externally publishedYes

Keywords

  • diastolic filling
  • echocardiography
  • exercise
  • interval training
  • left ventricle

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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