NUTR 125 Lecture Notes - Lecture 25: Pyruvic Acid, Triglyceride, Glycerol
Document Summary
Energy for muscle work: atp- chemical energy, generated from carbs, fat, proteins, used by cells for muscle contractions, only small amount is stored in resting cells (2-4 seconds worth of work, other sources of energy are needed. Fat fuel: rate of fat use- dependent of concentration of fatty acids in the bloodstream, prolonged exercise-fat becomes main food source, intense activity- fat is not a major source of furor requires more oxygen. Protein- minor source of fuel: during rest and low/moderate exercise (proved maybe 5% i energy needs, during endurance exercise (10-15% energy needs, branched chain amino acids provide most of the energy. Dietary advice for athletes: performance depends on athletic training and genetic makeup. However, diet can help maximize their potential: a poor diet can seriously reduce performance. Carbohydrates: before exercise, especially important for 90-120 minutes events, 1-2 hour before exercise, low glycemic foods, after exercise, lots of protein.
