FNH 350 Lecture Notes - Lecture 27: Vo2 Max, Anaerobic Glycolysis, Skeletal Muscle

• School: UBC
• Department: Food, Nutrition and Health
• Course: FNH 350
• Professor: Movassagh, Elham

Document Summary

Three energy systems in skeletal muscles during wide-ranging energy demands: The lactic acid system or anaerobic glycolysis. Relays increasingly on the glucose for energy as physical activity increase. Skeletal muscle uses primarily fatty acids during light physical activity. 20 40% vo2 max (normal daily physical activity) Skeletal muscle uses stored glycogen, and triacylglycerol as intensity increases. Carbohydrate oxidation and degradation of muscle glycogen. The duration of exercise at different levels of intensity: After 4 hours of high-intensity exercise glycogen is depleted and half tag is used up. Hepatic glycogenolysis and gluconeogenesis from lactate, glycerol and alanine become important. Plasma free fatty acids released from adipose tissue become the main fuel for high-intensity exercise lasting for more than 1 hour (marathon runners) To describe the metabolic pathways during fed state. To describe the metabolic pathways during post absorptive state. To describe the metabolic pathways during fasting state. To describe the metabolic pathways during starvation state.