The Effect of 8 Weeks Combined Training on The Ratio of Growth hormone to Insulin-like growth factor1 of Elderly Women

Document Type : original article

Abstract



Purpose: The use of different models of training, especially combined training exercises are common
among the elderly. The effect of combined training exercises on hormones and growth factors levels have
been little studied in aging. The purpose of this study was to investigate the effect of 8 weeks concurrent
training on growth hormone, IGF-1 serum concentration and GH/IGF-1 ratio in elderly women.Methods:
In this quasi-experimental study with pre test and post test design, twenty-one healthy elderly women (55-
70 years) were randomly placed into two groups, concurrent training (n=12) and control (n=9) groups.
Training program was done eight weeks, 3 times per week. In order to compare data within and between
groups, dependent t-test and independent t-test was used respectively. Results: The data showed GH,
IGF-1 and GH/IGF-1 ratio were not significantly changed (P≥0.05) following combined training. Also, a
significant decrease observed in body mass(P=0.005), BMI(P=0.005) and body fat percentage (P=0.001)
following 8 weeks combined training (P≤0.05) . VO2max increase significantly (P = 0.024) Conclusion:
In this study, 8 weeks of combined training led to non-significant increase in GH/IGF-1. Maybe, this
training in long-term leads to changes in GH and IGF-1. Therefore, Due to improvements in body
composition and aerobic power, maybe performing the long-term training program have a beneficial
effect on the performance of the cardiovascular system and can be prevented from developing
atherosclerosis.

Keywords

References

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Journal of Sport and Exercise Physiology
Volume 8, Issue 2 - Serial Number 16
September 2015
Pages 1249-1256

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History

  • Receive Date: 19 June 2016
  • Revise Date: 11 June 2024
  • Accept Date: 31 December 2020
  • First Publish Date: 31 December 2020
  • Publish Date: 22 November 2015

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