This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: NS 115 – Lecture 23 Substrates for Exercise Substrates for Exercise o What can you eat to maximize your ability to exercise (energy expenditure) o At rest you get ATP from carbs and fat o In the initial burst of energy you burn creatine phosphate for energy (0 10 secs) o During anaerobic (10 60 secs) exercise you use ATP from cytoplasm carbs Make ATP without using oxygen The RQ goes up significantly o Aerobic You use up all the carbohydrate, then the Krebs Cycle starts up Activated sympathetic, hormone sensitive lipase • You rely more on fatty acids and less on carbs • You can only store carbs in muscle and liver What Fuel is the body using to supply energy o Creatine o Carbohydrate Glycogen loading Carbs during event? • Some evidence that it’s useful o Water Most important, all the enzymatic activities in muscle requires water Hydration necessary for lactic acid exchange o Vitamins The Krebs Cycle requires vitamins Not necessarily true that we need them, they are recycled • Don’t necessarily enhance performance No need for supplements if • Intake increases • No vitamin deficiency exists already (vitamin deficiency impairs performance o Iron? Spinach is a poor source of iron o Protein Dave’s Dietary Delusions o Selling creatine to athletes, increases the amount of phosphate o You have an advantage in going longer without using carbohydrates o Effective Effective for activities that involve “short bouts of high –intensity physical activity.” • Jumping, sprinting, or cycling • Football, soccer, squash, lacrosse, track (short distance)...
View Full Document
- Fall '05
- Hemoglobin, Folic acid, vitamin deficiency