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Males who do extreme amounts of exercise, such as…

“Males who do extreme amounts of exercise, such as professional soccer players and runners who cover more than 40 or 50 miles a week, have less LHRH, LH, and testosterone in their circulation, smaller testes, less functional sperm. They also have higher levels of glucocorticoids in their…” quote by Robert M. Sapolsky
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““Males who do extreme amounts of exercise, such as professional soccer players and runners who cover more than 40 or 50 miles a week, have less LHRH, LH, and testosterone in their circulation, smaller testes, less functional sperm. They also have higher levels of glucocorticoids in their bloodstreams, even in the absence of stress. (A similar decline in reproductive function is found in men who are addicted to opiate drugs.)””

Robert M. Sapolsky

About This Quote

This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.

Extreme endurance exercise reduces male reproductive hormones, mirroring drug effects.

In simple terms: Intense training harms fertility.

Key Takeaway

Moderate exercise is healthier.

Themes

health exercise reproductive biology

Mood

cautious informative

Type

medical practical

When to use this quote

  • fitness coaching
  • medical counseling
  • athlete health
  • public health policy

Key Concepts

hormones stress physiology

Questions to Reflect On

  • How much training is optimal?
  • What alternatives support health without harming fertility?
A Different Perspective

Individual variation exists.

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