Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine ( 2014 ) 13 , 91 - 96

Research article
Hormone Responses to an Acute Bout of Low Intensity Blood Flow Restricted Resistance Exercise in College-Aged Females
Eonho Kim1, Lee D. Gregg1, Daeyeol Kim1, Vanessa D. Sherk2, Michael G. Bemben1, Debra A. Bemben2, 
Author Information
1 Neuromuscular Research Laboratory,
2 Bone Density Research Laboratory, Department of Health and Exercise Science, University of Oklahoma, USA

Debra A. Bemben
✉ University of Oklahoma, Department of Health and Exercise Science, 1401 Asp Ave Room 119 HHC, Norman, OK USA 73019
Email: dbemben@ou.edu
Publish Date
Received: 20-05-2013
Accepted: 23-09-2013
Published (online): 20-01-2014
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ABSTRACT

The purpose of this study was to determine whether the acute hormone response to exercise differed between low intensity blood flow restricted resistance exercise and traditional high-intensity resistance exercise in college-aged women. A total of 13 healthy women (aged 18-25 yrs), who were taking oral contraceptives, volunteered for this randomized crossover study. Subjects performed a session of low intensity blood flow restricted resistance exercise (BFR) (20% of 1-RM, 1 set 30 reps, 2 sets 15 reps) and a session of traditional high intensity resistance exercise without blood flow restriction (HI) (3 sets of 10 repetitions at 80% of 1-RM) on separate days. Fasting serum cortisol and growth hormone (GH) and blood lactate responses were measured in the morning pre and post exercise sessions. GH (Change: HI: 6.34 ± 1.72; BFR: 4.22 ± 1.40 ng·mL-1) and cortisol (Change: HI: 4.46 ± 1.53; BFR: 8.10 ± 2.30 ug·dL-1) significantly (p < 0.05) increased immediately post exercise for both protocols compared to baseline and there were no significant differences between the protocols for these responses. In contrast, blood lactate levels (HI: 7.35 ± 0.45; BFR: 4.02 ± 0.33 mmol·L-1) and ratings of perceived exertion were significantly (p < 0.01) higher for the HI protocol. In conclusion, acute BFR restricted resistance exercise stimulated similar increases in anabolic and catabolic hormone responses in young women.

Key words: Growth Hormone, Cortisol, blood flow restriction


           Key Points
  • Growth hormone and cortisol levels significantly increased after a single bout of low intensity blood flow restricted resistance exercise in young women.
  • There were no significant differences in hormone responses between the low intensity blood flow restricted protocol and the traditional high intensity higher total workload protocol.
  • Low intensity blood flow restricted resistance exercise provides a sufficient stimulus to elicit anabolic and catabolic hormone responses in young women.
 
 
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