E-07 Thematic Poster - Nutritional Status of Athletes I Friday, June 1, 2018, 9:30 AM - 11:30 AM Room: CC-Lower level L100E
PURPOSE: Sport nutrition guidelines support the idea that carbohydrates (CHO) are fundamental for performance, mainly for endurance. However recently published studies on long distance athletes suggested some advantages of a low CHO, high fat approach, i.e. ketogenic diets. We aimed to investigate the effects of ketogenic diet (KD) on triathlon athletes. :
METHODS: Sixteen expert athletes (age 30.67±10.46 yrs) were enrolled in the pilot trial. Eight athletes followed a ketogenic diet (KD) for 5 weeks whilst other eight followed a standard western diet (WD). Subjects were tested for maximal oxygen consumption (VO2max), peak power output (PPO), respiratory ratio (RR), heart rate, VO2, and blood lactate during one hour cycloergometer test at 45% of PPO, and body composition through electrical impedance (BIA). A two way ANOVA treatment x time test was performed.
RESULTS: After 5 weeks subjects in the KD group showed a significant increase of VO max (mlO xKg-1xmin-1) 35.68±3.86 to 36.6±5.1; a significant increase of PPO 2 2 (140±5.29 to 145±9), a significant decrease of fat mass (from 10.28±3.04 to 7.86±2.53 Kg), lactate (from 2.02±0.7 to 1.2±0.6) and of RR (from 0.86±0.03 to 0.79±0.01). No changes of lean body mass and time to exhaustion were detected.
CONCLUSIONS: Our data suggest that a ketogenic diet performed for a sufficient time (>4 weeks) could improve some parameters related to performance in high level triathlon athletes