TY - JOUR

T1 - The relationship between peak fat oxidation and prolonged double-poling endurance exercise performance

AU - Romer, Tue

AU - Hansen, Mikkel Thunestvedt

AU - Frandsen, Jacob

AU - Larsen, Steen

AU - Dela, Flemming

AU - Helge, Jorn Wulff

PY - 2020

Y1 - 2020

N2 - The peak fat oxidation rate (PFO) and the exercise intensity that elicits PFO (Fat(max)) are associated with endurance performance during exercise primarily involving lower body musculature, but it remains elusive whether these associations are present during predominant upper body exercise. The aim was to investigate the relationship between PFO and Fat(max)determined during a graded exercise test on a ski-ergometer using double-poling (GET-DP) and performance in the long-distance cross-country skiing race, Vasaloppet. Forty-three healthy men completed GET-DP and Vasaloppet and were divided into two subgroups: recreational (RS, n = 35) and elite (ES, n = 8) skiers. Additionally, RS completed a cycle-ergometer GET (GET-Cycling) to elucidate whether the potential relationships were specific to exercise modality. PFO (r(2) = .10,P = .044) and Fat(max)(r(2) = .26,P <.001) were correlated with performance; however,V & x2d9;O2peakwas the only independent predictor of performance (adj.R-2 = .36) across all participants. In ES, Fat(max)was the only variable associated with performance (r(2) = .54,P = .038). Within RS, DPV & x2d9;O2peak(r(2) = .11,P = .047) and ski-specific training background (r(2) = .30,P = .001) were associated with performance. Between the two GETs, Fat(max)(r(2) = .20,P = .006) but not PFO (r(2) = .07,P = .135) was correlated. Independent of exercise mode, neither PFO nor Fat(max)were associated with performance in RS (P > .05). These findings suggest that prolonged endurance performance is related to PFO and Fat(max)but foremost toV & x2d9;O2peakduring predominant upper body exercise. Interestingly, Fat(max)may be an important determinant of performance among ES. Among RS, DPV & x2d9;O2peak, and skiing experience appeared as performance predictors. Additionally, whole-body fat oxidation seemed specifically coupled to exercise modality.

AB - The peak fat oxidation rate (PFO) and the exercise intensity that elicits PFO (Fat(max)) are associated with endurance performance during exercise primarily involving lower body musculature, but it remains elusive whether these associations are present during predominant upper body exercise. The aim was to investigate the relationship between PFO and Fat(max)determined during a graded exercise test on a ski-ergometer using double-poling (GET-DP) and performance in the long-distance cross-country skiing race, Vasaloppet. Forty-three healthy men completed GET-DP and Vasaloppet and were divided into two subgroups: recreational (RS, n = 35) and elite (ES, n = 8) skiers. Additionally, RS completed a cycle-ergometer GET (GET-Cycling) to elucidate whether the potential relationships were specific to exercise modality. PFO (r(2) = .10,P = .044) and Fat(max)(r(2) = .26,P <.001) were correlated with performance; however,V & x2d9;O2peakwas the only independent predictor of performance (adj.R-2 = .36) across all participants. In ES, Fat(max)was the only variable associated with performance (r(2) = .54,P = .038). Within RS, DPV & x2d9;O2peak(r(2) = .11,P = .047) and ski-specific training background (r(2) = .30,P = .001) were associated with performance. Between the two GETs, Fat(max)(r(2) = .20,P = .006) but not PFO (r(2) = .07,P = .135) was correlated. Independent of exercise mode, neither PFO nor Fat(max)were associated with performance in RS (P > .05). These findings suggest that prolonged endurance performance is related to PFO and Fat(max)but foremost toV & x2d9;O2peakduring predominant upper body exercise. Interestingly, Fat(max)may be an important determinant of performance among ES. Among RS, DPV & x2d9;O2peak, and skiing experience appeared as performance predictors. Additionally, whole-body fat oxidation seemed specifically coupled to exercise modality.

KW - cross-country skiing

KW - double-poling

KW - peak fat oxidation

KW - prolonged endurance performance

KW - MUSCLE GLYCOGEN

KW - COUNTRY

KW - INTENSITY

KW - METABOLISM

KW - LEGS

KW - MOBILIZATION

KW - ADAPTATION

KW - KINETICS

KW - OXYGEN

KW - RATES

U2 - 10.1111/sms.13769

DO - 10.1111/sms.13769

M3 - Journal article

C2 - 32654310

VL - 30

SP - 2044

EP - 2056

JO - Scandinavian Journal of Medicine & Science in Sports

JF - Scandinavian Journal of Medicine & Science in Sports

SN - 0905-7188

IS - 11

ER -