APA 2134 Lecture Notes - Lecture 5: Homeostasis, Heat Cramps, Alpha Motor Neuron
15 Oct 2018
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This reduces the number of fibers capable of producing the muscular force needed for exercise: depletion in different muscle groups. It does not appear likely that glycogen depletion directly causes fatigue during endurance exercise performance, but it may play an indirect role. Impaired muscular function when muscle glycogen is low is usually explained by a compromised rate of atp production: glycogen is not distributed homogeneously throughout the muscle fiber, but is localised in pools, metabolic by-products and fatigue. Inorganic phosphate increases during intense short term exercise and. Pcr and atp are being broken down: the inorganic phosphate (which accumulates during exercise) may be the largest contributor to fatigue for this type of exercise. Lactic acid undergoes high turnover and only accumulates during brief high intensity exercise: to account for the lactic acid, the cells and bodily fluids possess buffers, such as bicarbonate, that minimizes the disrupting influence of the hydrogen ions.
