KINE 1020 Lecture 33: FATIGUE - January 23rd
8 Mar 2017
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Kine 1020 january 23, 2017 metabolism continued + fatigue. The oxidative system involves the breakdown of substrates in the presence of o2: yields more atp than atp-pcr and glycolysis. Oxidation of cho involves glycolysis, krebs and etc: end result: h2o, co2 and 32 atp per glucose molecule. Oxidation of fat involves (cid:494)beta oxidation(cid:495) that provides acetyl co-a: fat: atp depends on the type of fatty acid. The oxidative capacity of the muscle depends on enzyme concentrations which is related to fiber type and also depends on o2 availability. Energy system contributions at the start of high intensity exercise. They do not operate as a switch but they are a continuum (all turned on just different speeds) Atp-pcr contributes a lot of atp at beginning but it goes down at a rapid pace (0- Glycolysis overtime it has a steady average, last longer than atp-pcr at giving. Oxidative continuously increases before plateau (0-120s: almost all mitochondria at 2 minutes.
