Kinesiology 2230A/B Lecture 4:
29 Jan 2019
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Over the 80 min game: avg. Sprint is 20m 30x: fast jogging 20m 90x, approx 750 changes in speed - so lots of things happen in practice in oder to maximize the physiological demands of a rugby game. Glycolysis: breakdown of glucose to pyretic acid (pyruvate) Around 5mmom/l in the blood: pancreas is critical in glucose regulation, two di cells in the pancreas: Beta cells: form insulin so that it can be secreted out into the blood when blood glucose is too high. Glucagon is released from the alpha cells when glucose concentrations need to be increased: glucagon stimulates the liver to release glucose into the bloodstream. During the contractile sequence, the initial step is the calcium being released near the actin-myosin complex. It activates the glut 4 carriers so it enters the cell. Phosphofructokinase - slowest acting enzyme in glycolysis.
