THE EFFECTS OF A HIGH CARBOHYDRATE VS. A HIGH PROTEIN MEAL ON RESTING RER AND VO2
Previous research shows that carbohydrate-rich diets consumed prior to fitness testing improve performance better than fat-rich diets. Others have shown that high protein intake can improve performance following high-intensity exercise. However, the effects of short-term ingestion of protein and carbohydrate on resting metabolic parameters is unclear. PURPOSE: The purpose of this study was to determine if there is a difference in resting respiratory exchange ratio (RER) and resting oxygen consumption (VO2) based on the consumption of a high carbohydrate versus a high protein meal prior to testing. METHODS: Five subjects, 3 female and 2 males, aged 21-33 y volunteered for this study. All subjects participated in moderate physical activity (BMI 24-33 kg/m2). RER and VO2 were measured by indirect calorimetry (Cardiocoach CO2, KORR Medical Technologies, Salt Lake City, UT) two hours after the ingestion of either a high-carbohydrate or an isocaloric high-protein meal. A dependent t-test was used to determine significant differences between means between conditions (p<0.05; SPSS v.21). RESULTS: The mean difference between meal conditions for RER was 0.020 +/- 0.035 (p>0.28) and for VO2 was 25.4 +/- 56.3 ml/kg/min (p>0.37). CONCLUSION: Based on our results, we conclude that there is no significant difference in RER value or VO2 when consuming a high-CHO diet vs a high-protein diet. While diet may have a short-term effect on performance, our study suggests that it does not affect RER or resting oxygen consumption. Future research should examine this relationship in more subjects and with a longer dietary intervention period.
McCready, V; Chase, K; DeAvila, M; Pollard, C; and Witzke, K
"THE EFFECTS OF A HIGH CARBOHYDRATE VS. A HIGH PROTEIN MEAL ON RESTING RER AND VO2,"
International Journal of Exercise Science: Conference Proceedings: Vol. 8:
3, Article 31.
Available at: https://digitalcommons.wku.edu/ijesab/vol8/iss3/31