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Endocrine responses to resistance exercise.

W J Kraemer1

  • 1Exercise Physiology Division, U.S. Army Research Institute of Environmental Medicine, Natick, MA 01760-5007.

Medicine and Science in Sports and Exercise
|October 1, 1988
PubMed
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Resistance training impacts hormones involved in stress and growth. Exercise intensity, muscle mass, and volume significantly influence these hormonal responses, aiding in understanding training adaptations.

Area of Science:

  • Exercise Physiology
  • Endocrinology
  • Sports Science

Background:

  • Hormonal mechanisms are crucial for both immediate physiological adjustments and long-term cellular adaptations to exercise.
  • Existing research has not fully elucidated how specific resistance training variables influence hormonal responses.

Purpose of the Study:

  • To review the hormonal responses to resistance training, focusing on acute stress and growth-promoting hormones.
  • To identify key exercise variables that modulate these hormonal alterations.

Main Methods:

  • Review of existing literature on resistance training and hormonal responses.
  • Analysis of studies examining the relationship between exercise variables (intensity, muscle mass, volume) and hormonal concentrations.

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Main Results:

  • Resistance exercise protocols consistently increase peripheral hormonal concentrations.
  • Exercise intensity and the amount of muscle mass engaged are significant determinants of hormonal responses.
  • Exercise volume (sets x repetitions x intensity) also plays a key role in modulating hormonal outcomes.

Conclusions:

  • Specific exercise variables like intensity, muscle mass utilized, and volume are critical factors influencing hormonal responses to resistance training.
  • Further research is needed to understand the impact of other variables, such as rest period length, on hormonal alterations.
  • This knowledge is vital for a comprehensive understanding of the exercise stimulus and its role in resistance training adaptations.