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Effect of multiple set on intramuscular metabolic stress during low-intensity resistance exercise with blood flow restriction

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Title: Effect of multiple set on intramuscular metabolic stress during low-intensity resistance exercise with blood flow restriction
Authors: Suga, Tadashi Browse this author →KAKEN DB
Okita, Koichi Browse this author →KAKEN DB
Takada, Shingo Browse this author →KAKEN DB
Omokawa, Masashi Browse this author
Kadoguchi, Tomoyasu Browse this author
Yokota, Takashi Browse this author →KAKEN DB
Hirabayashi, Kagami Browse this author
Takahashi, Masashige Browse this author
Morita, Noriteru Browse this author →KAKEN DB
Horiuchi, Masahiro Browse this author
Kinugawa, Shintaro Browse this author →KAKEN DB
Tsutsui, Hiroyuki Browse this author →KAKEN DB
Keywords: Energetic metabolism
Resistance training
Magnetic resonance spectroscopy
Muscle hypertrophy
Issue Date: Nov-2012
Publisher: Springer-Verlag
Journal Title: European Journal of Applied Physiology
Volume: 112
Issue: 11
Start Page: 3915
End Page: 3920
Publisher DOI: 10.1007/s00421-012-2377-x
Abstract: Our previous study reported that intramuscular metabolic stress during low-intensity resistance exercise was significantly enhanced by combining blood flow restriction (BFR); however, they did not reach the levels achieved during high-intensity resistance exercise. That study was performed using a single set of exercise; however, usual resistance exercise consists of multiple sets with rest intervals. Therefore, we investigated the intramuscular metabolic stress during multiple-set BFR exercises, and compared the results with those during multiple-set high-intensity resistance exercise. Twelve healthy young subjects performed 3 sets of 1-min unilateral plantar flexion (30 repetitions) with 1-min intervals under 4 different conditions: low intensity (L, 20 % 1 RM) and high intensity (H, 65 % 1 RM) without BFR, and L with intermittent BFR (IBFR, only during exercise) and with continuous BFR (CBFR, during rest intervals as well as exercise). Intramuscular metabolic stress, defined as intramuscular metabolites and pH, and muscle fiber recruitment were evaluated by 31P-magnetic resonance spectroscopy. The changes of intramuscular metabolites and pH during IBFR were significantly greater than those in L but significantly lower than those in H. By contrast, those changes in CBFR were similar to those in H. Moreover, the fast-twitch fiber recruitment, evaluating by a splitting Pi peak, showed a similar level to H. In conclusion, the multiple sets of low-intensity resistance exercise with continuous BFR could achieve with the same metabolic stress as multiple sets of high-intensity resistance exercise.
Type: article
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 菅 唯志

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