Physical activity and male reproductive function

Area of Science:

• Reproductive biology
• Human physiology
• Exercise science

Background:

• Male infertility is a growing concern, significantly impacting human fecundity.
• Poor sperm parameters are strongly associated with sedentary lifestyles, unhealthy diets, and resulting visceral adiposity.
• Elevated scrotal temperature and adipocyte dysfunction contribute to reduced sperm quality.

Purpose of the Study:

• To investigate the impact of physical activity on male fertility and sperm parameters.
• To differentiate the effects of low-to-moderate versus high-intensity exercise on male reproductive health.
• To identify optimal exercise strategies for maintaining male reproductive health.

Main Methods:

• Review of existing literature on physical activity, lifestyle factors, and male fertility.
• Analysis of the physiological mechanisms linking exercise intensity to sperm parameters.
• Comparison of outcomes between sedentary, active, and differently exercising male populations.

Main Results:

• Sedentary men and those with unhealthy lifestyles exhibit poorer sperm parameters.
• Low-to-moderate intensity exercises generally improve sperm quality by enhancing organ function, weight management, and reducing oxidative stress.
• High-intensity exercises can negatively impact spermatozoa due to hormonal axis disruption, increased testicular temperature, and oxidative stress.

Conclusions:

• Not all exercise forms benefit male reproductive health; intensity matters.
• Low-to-moderate intensity exercise shows promise for improving male fertility and sperm parameters.
• Further research is needed to pinpoint specific low-to-moderate intensity exercises that optimize male reproductive health without increasing testicular temperature or oxidative stress.