Effects of a high-carbohydrate versus high-protein meal on acute responses to hypoxia at rest and exercise

摘要: A carbohydrate (CHO) solution consumed before exposure to hypoxia has been reported reduce arterial oxygen desaturation at rest. The purpose of this study was determine whether effect occurred during exercise and when the CHO load is part a meal. Eleven male subjects (mean age 20.1 ± 1.8 years, BMI 24.3 2.4 kg m2) either high-CHO (2,340 kJ, 70 % CHO, 12 protein) or an isoenergetic high-protein (35 48 breakfast meal 60 min being exposed 15 (FIO2 = 13.5 %) followed by 30 in (60 \( \dot{V}{\text{O}}_{{2{ \max }}} \)). Saturation via pulse oxymeter (SpO2), ventilatory parameters, substrate oxidation, interstitial glucose concentrations, heart rate variability (HRV) were monitored continuously whole session. Results showed no from type on SpO2 rest but 3.1 0.4 reduction (P < 0.005) compared version. This associated with higher levels ventilation 0.05) CO2 production 0.01). Glucose oxidation after than over session (+19.4 + 4.0 %, P 0.0001), whereas increased only 0.001). HRV indices not different between conditions. In conclusion, prior moderate condition reduced