Affiliations 

  • 1 Department of Physical Education, Zhengzhou Shengda University, Zhengzhou, China
  • 2 Internal Medicine-Cardiovascular Department, Tangshan Hongci Hospital, Tangshan, China
  • 3 Department of Life Sciences, Inner Mongolia University, Inner Mongolia, China
  • 4 School of Health Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
J Int Med Res, 2021 Sep;49(9):3000605211039564.
PMID: 34486432 DOI: 10.1177/03000605211039564

Abstract

OBJECTIVE: To investigate the changes in serum growth hormone (GH), testosterone, and insulin-like growth factor 1 (IGF-1) during low-intensity resistance exercise under different cuff pressures.

METHODS: We performed a single-blind, cross-over design study. Twenty-five healthy young men performed three exercise protocols as follows: 1) no blood flow restriction exercise (control group), 2) resistance exercise at 40% of arterial occlusion pressure (AOP) (low group), and 3) resistance exercise at 70% of AOP (high group). Blood lactate, GH, testosterone, and IGF-1 levels were measured at four time points.

RESULTS: There were no differences in the indices before exercise. The blood flow restriction exercise under different pressures had different effects on each index and there was an interactive effect. GH levels were significantly higher in the high group than in the other groups after exercise. Immediately after exercise, IGF-1 and testosterone levels were significantly higher in the high group than in the other groups. At 15 minutes after exercise, testosterone levels were significantly higher in the high group than in the other groups.

CONCLUSIONS: Low-intensity resistance exercise combined with blood flow restriction effectively increases GH, IGF-1, and testosterone levels in young men. Increasing the cuff pressure results in greater levels of hormone secretion.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.