Impact of Reduced Carbohydrate Intake after Exercise on Breath Acetone Levels

• DOI: 10.1249/01.mss.0000561630.61248.1f
• Publication Date: 2019-06-25T18:28:51Z
• Authors: naoki ota; hiroto ito; kazushige goto
• Keywords: Sprint; Respiratory exchange ratio

PURPOSE: The purpose of the present study was to deter determine impact reduced carbohydrate (CHO) intake after sprint exercise on breath acetone levels during post-exercise. METHODS: Nine subjects (20.8 ± 0.2 yrs, 170.1 1.6 cm, 65.1 1.8 kg) conducted two trials, consisting lower CHO trial (LOW) or normal (NOR). In each trial, came laboratory at 7:30 evaluate level, blood variables and resting metabolic rate. From 17:00, they started repeated (4 × 30 s maximal cycle exercise). After exercise, isoenergetic meals (during 2-3 h exercise) were provided with containing (60% for CHO, 20% protein, fat) NOR (20% 60% LOW. Time course changes in monitored immediately before 1 h, 3h, 4h following morning. RESULTS: LOW, markedly increased post-exercise (trial time interaction: p<0.05). At 4 level significantly higher LOW (0.9 0.02 ppm) than (0.66 0.07 ppm, p < 0.05). However, a significant difference between trials not observed Respiratory exchange ratio (RER) morning (0.81 0.02) (0.87 0.02, Moreover, showed contribution oxidation (34 4.8 %) that (50 6.2 %, 0.05), whereas fat (66 CONCLUSIONS: Reduced early phase exercise), suggesting augmented metabolism liver under impaired availability. by evident results may suggest can be available availability intensive exercise.