FDNS 2100 Lecture Notes - Lecture 7: Performance-Enhancing Substance, Hypertriglyceridemia, Carnitine
Document Summary
Ingest a high-fat (40-70% fat) diet for 1-3 weeks. Some studies provide high-carbohydrate meals prior to testing. Research findings from studies and reviews with trained individuals. It appears that there are responders and non-responders. Increased exercise time to exhaustion at moderate intensity. Greater fat utilization and sparing of muscle glycogen. Suggest performance at 60-80% vo2max may be improved in distance cyclists and runners. No effect on cycling time trial (100 km) In several studies, there was a greater fat utilization and sparing of muscle glycogen. In several studies, performance time was better with the high-fat diet, but not statistically significant. Overall, research findings are equivocal but generally indicate that a chronic high-fat diet does not enhance aerobic endurance performance. Endurance performance can, at best, only be maintained on such diets as compared to high carbohydrate diets. Endurance athletes may adapt to high-fat diets, but training becomes more psychologically stressful. Chronic high fat diets the bottom line.