Acute hormonal responses in elite junior weightlifters

Area of Science:

• Exercise Physiology
• Endocrinology
• Sports Science

Background:

• Limited research exists on resistance exercise and testosterone in adolescent males.
• Few studies explore training experience's impact on acute hormonal responses in young male weightlifters.

Purpose of the Study:

• To investigate acute hormonal responses, specifically serum testosterone, to a weightlifting protocol in junior elite male weightlifters.
• To determine the influence of training experience on these hormonal responses.

Main Methods:

• An acute weightlifting protocol simulating snatch lift training was administered to 28 junior elite male weightlifters (17.3 ± 1.4 years).
• Blood samples were collected at baseline, pre-exercise, and 5 and 15 minutes post-exercise to measure serum testosterone, cortisol, growth hormone, beta-endorphin, and lactate.
• Participants were categorized based on training experience (≤2 years vs. >2 years).

Main Results:

• The exercise protocol significantly increased testosterone, cortisol, growth hormone, beta-endorphin, and lactate compared to pre-exercise levels.
• Weightlifters with over two years of training experience showed significant increases in serum testosterone post-exercise.
• No significant influence of training experience was observed for other measured hormones or lactate.

Conclusions:

• Resistance exercise can induce significant increases in serum testosterone in adolescent male weightlifters with substantial training experience (>2 years).
• Training experience appears to be a critical factor modulating the acute testosterone response to weightlifting in this population.
• Further research is needed to understand the long-term hormonal adaptations in adolescent athletes.