HES 250 Lecture Notes - Lecture 16: Lean Body Mass, Indirect Calorimetry, Carbohydrate Metabolism
Document Summary
Major factors influencing carbohydrate and fat metabolism: Intensity: duration, mode (type of exercise, training status. Calculation of carbohydrate oxidation: gender, age, metabolic diseases. Rq = vco2/vo2 caloric equivalent (kcal/lo2) energy expenditure. Carbohydrate oxidation = energy expenditure % usage of carbohydrate. Does carbohydrate oxidation mean the same thing as muscle glycogen utilization? (no. : muscle glycogen supplies energy during muscle contraction, liver glycogen maintains blood glucose, carbohydrate oxidation measures the total bodily carbohydrates used. Indirect calorimetry (measuring rq total carbohydrate oxidation: combining muscle biopsy with indirect calorimetry. Total muscle = liver glycogen utilization. Women: study: determinants of fat oxidation during exercise in healthy men and women: a cross- section study. Women burn proportionally more fat and less carbohydrates compared to men (at same relative intensities: study: regulation of exercise carbohydrate metabolism by estrogen and progesterone in women. Estrogen partially responsible for the higher fat utilization.
