157x Filetype PPT File size 2.89 MB Source: fac.ksu.edu.sa
Chapter 2 Introduction • Carbohydrate as a Fuel for Exercise: – Well-documented that CHO is important for athletic performance – High levels of stored glycogen before endurance exercise (esp. > 1hr) can help increase performance & reduce time to fatigue – High CHO post-exercise enhances recovery – Many athletes consume inadequate levels of CHO to support their training Dietary Carbohydrate • Optimum dietary CHO levels depend on: – Total energy intake – Body size – Health status – Duration, intensity, frequency, and type of exercise Function, Classification, and Dietary Sources of Carbohydrate Function of Carbohydrates • CHO are: – Primary source of energy (1 of 3 macronutrients) – Provide the substrate necessary for glycogen replacement (substrate: glucose) – When consumed during exercise, help maintain BG levels & help prevent premature fatigue • CHO recommendations for active individuals: – Moderate training: 5-7 g/kg of BW – Heavy training: up to 10 g/kg of BW (Burke, 2007) Classification of Dietary CHO • Different ways to classify CHO – Type of CHO found in the food – Level of commercial processing the food has undergone – BG or glycemic response to the CHO within the body
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