Blood flow after contraction of short duration reaches its peak by 3 rd cardiac cycle

Fumiko Ohmori, Shizuyo Shimizu, Takafumi Hamaoka, Atsuko Kagaya

Research output: Contribution to journalArticle

Abstract

The purpose of this study was to elucidate how long it takes to reach peak blood flow after muscle contractions in consideration of the cardiac cycle. Seven healthy female subjects performed two successive dynamic plantar flexions of 1-s duration at 30, 50 and 70% of maximal voluntary contraction (MVC). Based upon the blood flow response after a single contraction, we set up intervals during two successive contractions each corresponding to 10% (101), 30% (301) and 50% (501) of the time required to reach peak blood flow. Upon cessation of contraction, the popliteal artery blood flow (Q̇pa) increased progressive, beat-by-beat increase and peaked by the 5th cardiac cycle, for all conditions. The highest peak blood flow among the cardiac cycle was at 3 rd cycle in overall data. Peak Q̇pa values reached after exercise did not differ among intervals, whereas peak Q̇pa value attained after exercise was significantly greater in 50 and 70%MVC than 30%MVC (p<0.05). The result indicates that the augmentation of the Q̇pa after exercise with short duration differed with the exercise intensity but the timing for reaching peak post-exercise value did not differ in terms of the number of cardiac cycles.

Original languageEnglish
Pages (from-to)153-157
Number of pages5
JournalJapanese Journal of Physical Fitness and Sports Medicine
Volume55
Issue numberSUPPL.
DOIs
Publication statusPublished - 2006 Oct

Keywords

  • Interval
  • Peak blood flow
  • Popliteal artery

ASJC Scopus subject areas

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

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