Documented experiences of the second wind return at the very least 100 years, when it was taken to be a generally held fact of exercise. Regardless of whether the patient experiences signs of muscle pain, muscle fatigue, asteroidsathome.net or cramping, the phenomenon of second wind having been achieved is demonstrable by the signal of an elevated heart fee dropping whereas sustaining the same velocity on the treadmill. Inactive patients skilled second wind, demonstrated by means of relief of typical signs and the sign of an elevated coronary heart price dropping, while performing low-reasonable aerobic exercise (walking or brisk walking). For the usually lively patients, it took extra strenuous exercise (very brisk walking/jogging or bicycling) for them to experience both the typical symptoms and docs.brdocsdigitais.com relief thereof, along with the sign of an elevated coronary heart charge dropping, demonstrating second wind. As such, these with muscle glycogenoses do not have to 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 change into the predominant supply of energy.
The delay between "hitting the wall" and "second wind" occurring, has to do with the gradual pace at which fatty acids sufficiently produce ATP (vitality)