what happens inside the body when athletes get a “2nd wind”?

Question

what happens inside the body when athletes get a “2nd wind”?

In: 403

Answer 1

There was a study looking at fatigue in muscles. A frogs leg muscle was extracted and placed between electrodes that pulsed, causing it to repeatedly contract. Eventually the muscle stopped contracting. When lactic acid was added to the muscle, it started contracting again.
Lactic acid seems to increase facilitate longer muscle action, so a buildup of lactic acid may give rise to a second wind.