Maximal Fat Oxidation is Related to Performance in an Ironman Triathlon
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Maximal Fat Oxidation is Related to Performance in an Ironman Triathlon. / Frandsen, Jacob; Vest, Stine Dahl; Dela, Flemming; Helge, Jørn W.
I: International Journal of Sports Medicine, Bind 38, Nr. 13, 2017, s. 975-982.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › fagfællebedømt
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TY - JOUR
T1 - Maximal Fat Oxidation is Related to Performance in an Ironman Triathlon
AU - Frandsen, Jacob
AU - Vest, Stine Dahl
AU - Dela, Flemming
AU - Helge, Jørn W
N1 - © Georg Thieme Verlag KG Stuttgart · New York.
PY - 2017
Y1 - 2017
N2 - The aim of the present study was to investigate the relationship between maximal fat oxidation rate (MFO) measured during a progressive exercise test on a cycle ergometer and ultra-endurance performance. 61 male ironman athletes (age: 35±1 yrs. [23-47 yrs.], with a BMI of 23.6±0.3 kg/m(2) [20.0-30.1 kg/m(2)], a body fat percentage of 16.7±0.7% [8.4-30.7%] and a VO2peak of 58.7±0.7 ml/min/kg [43.9-72.5 ml/min/kg] SEM [Range]) were tested in the laboratory between 25 and 4 days prior to the ultra-endurance event, 2016 Ironman Copenhagen. Simple bivariate analyses revealed significant negative correlations between race time and MFO (r(2)=0.12, p<0.005) and VO2peak (r(2)=0.45, p<0.0001) and a positive correlation between race time and body fat percentage (r(2)=0.27, p<0.0001). MFO and VO2peak were not correlated. When the significant variables from the bivariate regression analyses were entered into the multiple regression models, VO2peak and MFO together explained 50% of the variation observed in race time among the 61 Ironman athletes (adj R(2)=0.50, p<0.001). These results suggests that maximal fat oxidation rate exert an independent influence on ultra-endurance performance (>9 h). Furthermore, we demonstrate that 50% of the variation in Ironman triathlon race time can be explained by peak oxygen uptake and maximal fat oxidation.
AB - The aim of the present study was to investigate the relationship between maximal fat oxidation rate (MFO) measured during a progressive exercise test on a cycle ergometer and ultra-endurance performance. 61 male ironman athletes (age: 35±1 yrs. [23-47 yrs.], with a BMI of 23.6±0.3 kg/m(2) [20.0-30.1 kg/m(2)], a body fat percentage of 16.7±0.7% [8.4-30.7%] and a VO2peak of 58.7±0.7 ml/min/kg [43.9-72.5 ml/min/kg] SEM [Range]) were tested in the laboratory between 25 and 4 days prior to the ultra-endurance event, 2016 Ironman Copenhagen. Simple bivariate analyses revealed significant negative correlations between race time and MFO (r(2)=0.12, p<0.005) and VO2peak (r(2)=0.45, p<0.0001) and a positive correlation between race time and body fat percentage (r(2)=0.27, p<0.0001). MFO and VO2peak were not correlated. When the significant variables from the bivariate regression analyses were entered into the multiple regression models, VO2peak and MFO together explained 50% of the variation observed in race time among the 61 Ironman athletes (adj R(2)=0.50, p<0.001). These results suggests that maximal fat oxidation rate exert an independent influence on ultra-endurance performance (>9 h). Furthermore, we demonstrate that 50% of the variation in Ironman triathlon race time can be explained by peak oxygen uptake and maximal fat oxidation.
KW - Journal Article
U2 - 10.1055/s-0043-117178
DO - 10.1055/s-0043-117178
M3 - Journal article
C2 - 29050040
VL - 38
SP - 975
EP - 982
JO - International Journal of Sports Medicine
JF - International Journal of Sports Medicine
SN - 0172-4622
IS - 13
ER -
ID: 184740011