Documented experiences of the second wind return a minimum of a hundred years, when it was taken to be a commonly held reality of exercise. Regardless of whether or not the affected person experiences signs of muscle pain, muscle fatigue, or cramping, the phenomenon of second wind having been achieved is demonstrable by the sign of an increased heart charge dropping while sustaining the identical velocity on the treadmill. Inactive patients experienced second wind, demonstrated via relief of typical signs and AquaSculpt Reviews the signal of an elevated heart charge dropping, whereas performing low-moderate aerobic exercise (walking or brisk strolling). For the often energetic patients, it took more strenuous exercise (very brisk strolling/jogging or bicycling) for them to expertise each the typical signs and relief thereof, along with the sign of an increased coronary heart charge dropping, AquaSculpt fat oxidation demonstrating second wind. As such, these with muscle glycogenoses don't need to do extended exercise to expertise "hitting the wall". In experienced athletes, "hitting the wall" is conventionally believed to be because of the body's glycogen shops being depleted, with "second wind" occurring when fatty acids develop into the predominant supply of vitality.

The delay between "hitting the wall" and "second wind" occurring, has to do with the sluggish velocity at which fatty acids sufficiently produce ATP (vitality)