TY - JOUR
T1 - V̇O 2 response at the onset of heavy exercise is accelerated not by diathermic warming of the thigh muscles but by prior heavy exercise
AU - Fukuba, Yoshiyuki
AU - Shinhara, Yuko
AU - Houman, Toshiko
AU - Endo, Masako Yamaoka
AU - Yamada, Masako
AU - Miura, Akira
AU - Hayashi, Naoyuki
AU - Sato, Hironori
AU - Koga, Shunsaku
AU - Yoshida, Takayoshi
N1 - Funding Information:
This study was supported in part by MEXT-KAKENHI and JSPS-KAKENHI in Japan (No. 13680024 to T. Yoshida, No. 19650158 and 21370111 to Y. Fukuba, No. 18207019 to S. Koga and No. 20700526 to M. Y. Endo).
PY - 2012/1
Y1 - 2012/1
N2 - 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.
AB - 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.
KW - diathermia
KW - heavy exercise
KW - muscle temperature
KW - pulmonary oxygen uptake
KW - warm-up
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U2 - 10.1080/15438627.2012.634672
DO - 10.1080/15438627.2012.634672
M3 - Article
C2 - 22242734
AN - SCOPUS:84856146433
VL - 20
SP - 13
EP - 24
JO - Sports Training, Medicine and Rehabilitation
JF - Sports Training, Medicine and Rehabilitation
SN - 1543-8627
IS - 1
ER -