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

Content Provider	Springer Nature Link
Author	Suga, Tadashi Okita, Koichi Takada, Shingo Omokawa, Masashi Kadoguchi, Tomoyasu Yokota, Takashi Hirabayashi, Kagami Takahashi, Masashige Morita, riteru Horiuchi, Masahiro Kinugawa, Shintaro Tsutsui, Hiroyuki
Copyright Year	2012
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.
Starting Page	3915
Ending Page	3920
Page Count	6
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	112
Issue Number	11
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-03-14
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Energetic metabolism Resistance training Magnetic resonance spectroscopy Muscle hypertrophy Human Physiology Occupational Medicine/Industrial Medicine Sports Medicine
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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