Fatmax In Runners: Performance Link.pdf

Eighteen amateur runners participated in a study to compare maximal fat oxidation rate (Fatmax) between moderate- and low-performance runners. The subjects performed an incremental treadmill test to estimate individual Fatmax based on gas measures and a 10,000-m run on a track. The subjects were divided into low and moderate performance groups using two different criteria: 10,000-m time and VO2max values. When groups were divided using 10,000-m time, there was no significant difference in Fatmax or in the exercise intensity that elicited Fatmax between the moderate and low performance groups. However, when groups were divided using VO2max values, Fatmax was significantly lower in the low VO2max group than in the high VO2max group. The intensity that elicited Fatmax did not differ between groups. Fatmax or %VO2max that elicited Fatmax was not associated with 10,000-m time. The only variable associated with 10,000-m running performance was %VO2max used during the run. The criteria used for the division of groups according to training status might influence the identification of differences in Fatmax or in the intensity that elicits Fatmax.