V̇O 2 response at the onset of heavy exercise is accelerated not by diathermic warming of the thigh muscles but by prior heavy exercise

Yoshiyuki Fukuba*, Yuko Shinhara, Toshiko Houman, Masako Yamaoka Endo, Masako Yamada, Akira Miura, Naoyuki Hayashi, Hironori Sato, Shunsaku Koga, Takayoshi Yoshida

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We investigated whether the elevated muscle temperature induced by the first bout influenced V̇O 2 the response during a second-bout of heavy exercise. The control conditions were two consecutive 6-min leg cycling bouts (work rate: δ50% between LT and V̇O 2 max) separated by a 6-min baseline at 20 W (L1-ex to L2-ex). In the experimental conditions prior to the main bout (H2-ex), the diathermic warming to the front thigh was substituted for the first-bout. The V̇O 2 response for the second bout was significantly accelerated compared with the first bout (mean ± SD of the τ by monoexponential fitting: L1-ex: 53.8 ± 11.6, L2-ex: 38.7 ± 7.9 s, P < 0.05). The diathermic warm-up, however, could not accelerate response for subsequent supra-LT leg exercise (τ for H2-ex: 52.3 ± 7.7 s). It was concluded that the facilitation of V̇O 2 response during supra-LT exercise after prior heavy exercise does not seem to be caused by increased muscle temperature per se and its related factors.

Original languageEnglish
Pages (from-to)13-24
Number of pages12
JournalResearch in Sports Medicine
Volume20
Issue number1
DOIs
Publication statusPublished - 2012 Jan
Externally publishedYes

Keywords

  • diathermia
  • heavy exercise
  • muscle temperature
  • pulmonary oxygen uptake
  • warm-up

ASJC Scopus subject areas

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

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