Documented experiences of the second wind go back no less than 100 years, when it was taken to be a commonly held fact of exercise. No matter whether the patient experiences signs of muscle pain, muscle fatigue, or cramping, the phenomenon of second wind having been achieved is demonstrable by the sign of an elevated heart fee dropping whereas maintaining the identical speed on the treadmill. Inactive patients experienced second wind, demonstrated through relief of typical signs and the signal of an increased heart price dropping, whereas performing low-moderate aerobic exercise (strolling or brisk walking). For the regularly lively patients, it took extra strenuous exercise (very brisk walking/jogging or bicycling) for them to experience both the typical symptoms and relief thereof, together with the sign of an increased heart fee dropping, demonstrating second wind. As such, Mitolyn Official Site these with muscle glycogenoses don’t must do extended exercise to experience “hitting the wall”. In experienced athletes, “hitting the wall” is conventionally believed to be as a result of physique’s glycogen shops being depleted, with “second wind” occurring when fatty acids grow to be the predominant source of energy.

The delay between “hitting the wall” and “second wind” occurring, has to do with the slow speed at which fatty acids sufficiently produce ATP (energy)