KINE 1020 Lecture : Jan7-Feb 17 by Ricardo.doc
6 Jun 2014
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Factors affecting muscle health and fitness (january 7 13) [dr. belcastro: myosin: atp adp + phosphate, myosin + actin = force. Energy systems to replenish atp (are all integrated even though are separated: phosphagen (immediate) Anaerobic system does not require o2. Occurs in sarcoplasm: glycolytic (uses glucose) Breakdown of carbs, either glycogen stored in muscle or in blood to make atp. Occurs in sarcoplasm: oxidative phosphorylation (uses glucose + lipids) Primary source of atp at rest and low intensity: glycolysis, converts glucose 6-p pyruvate, pfk is the rate controlling reaction. Low rate slower the conversion: allows aerobic and anaerobic respiration, glycolysis through anaerobic respiration is main source of energy for cells, glycolytic energy system o o. In anaerobic glycolytic, glycogen in muscle or muscle lactate is formed. Skeletal muscle fatigue: the inability to maintain required power output which is related to a decline in force, velocity and power.
