Performance and Fatigue Patterns in Elite Cyclists During 6 h of Simulated Road Racing
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Performance and Fatigue Patterns in Elite Cyclists During 6 h of Simulated Road Racing. / Klaris, Magnus Bak; Cubel, Claes; Bruun, Tim Ravn; Stampe, Daniel; Rørvik, Stian; Fischer, Mads; Bonne, Thomas; Christensen, Peter M; Piil, Jacob Feder; Nybo, Lars.
In: Scandinavian Journal of Medicine & Science in Sports, Vol. 34, No. 7, e14699, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Performance and Fatigue Patterns in Elite Cyclists During 6 h of Simulated Road Racing
AU - Klaris, Magnus Bak
AU - Cubel, Claes
AU - Bruun, Tim Ravn
AU - Stampe, Daniel
AU - Rørvik, Stian
AU - Fischer, Mads
AU - Bonne, Thomas
AU - Christensen, Peter M
AU - Piil, Jacob Feder
AU - Nybo, Lars
N1 - © 2024 The Author(s). Scandinavian Journal of Medicine & Science In Sports published by John Wiley & Sons Ltd.
PY - 2024
Y1 - 2024
N2 - Fatigue resistance is vital for success in elite road cycling, as repeated, intense efforts challenge the athletes' ability to sustain peak performance throughout prolonged races. The present study combined recurrent performance testing and physiological measures during 6 h simulated racing with laboratory testing to investigate factors influencing fatigue resistance. Twelve male national elite cyclists (25 ± 3 years; 76 ± 6 kg and VO 2max of 5.2 ± 0.5 L/min) completed incremental power and maximal fat oxidation tests. Subsequently, they underwent field testing with physiological measures and fatigue responses evaluated through peak sprint power and 5 km time trial (TT) testing after 0, 2, 4, and 6 h of exercise. Peak power declined from 1362 ± 176 W in first sprint to 1271 ± 152 W after 2 h (p < 0.01) and then stabilized. In contrast, TT mean power gradually declined from 412 ± 38 W in the first TT to 384 ± 41 W in the final trial, with individual losses ranging from 2% to 14% and moderately correlated (r 2 = 0.45) to accumulated exercise time above lactate threshold. High carbohydrate intake (~90 g/h) maintained blood glucose levels, but post-TT [lactate] decreased from 15.1 ± 2 mM to 7.1 ± 2.3 mM, while fat oxidation increased from 0.7 ± 0.3 g/min at 0 h to 1.1 ± 0.1 g/min after 6 h. The study identifies fatigue patterns in national elite cyclists. Peak sprint power stabilized after an initial impairment from 0 to 2 h, while TT power gradually declined over the 6 h simulated race, with increased differentiation in fatigue responses among athletes.
AB - Fatigue resistance is vital for success in elite road cycling, as repeated, intense efforts challenge the athletes' ability to sustain peak performance throughout prolonged races. The present study combined recurrent performance testing and physiological measures during 6 h simulated racing with laboratory testing to investigate factors influencing fatigue resistance. Twelve male national elite cyclists (25 ± 3 years; 76 ± 6 kg and VO 2max of 5.2 ± 0.5 L/min) completed incremental power and maximal fat oxidation tests. Subsequently, they underwent field testing with physiological measures and fatigue responses evaluated through peak sprint power and 5 km time trial (TT) testing after 0, 2, 4, and 6 h of exercise. Peak power declined from 1362 ± 176 W in first sprint to 1271 ± 152 W after 2 h (p < 0.01) and then stabilized. In contrast, TT mean power gradually declined from 412 ± 38 W in the first TT to 384 ± 41 W in the final trial, with individual losses ranging from 2% to 14% and moderately correlated (r 2 = 0.45) to accumulated exercise time above lactate threshold. High carbohydrate intake (~90 g/h) maintained blood glucose levels, but post-TT [lactate] decreased from 15.1 ± 2 mM to 7.1 ± 2.3 mM, while fat oxidation increased from 0.7 ± 0.3 g/min at 0 h to 1.1 ± 0.1 g/min after 6 h. The study identifies fatigue patterns in national elite cyclists. Peak sprint power stabilized after an initial impairment from 0 to 2 h, while TT power gradually declined over the 6 h simulated race, with increased differentiation in fatigue responses among athletes.
KW - Humans
KW - Bicycling/physiology
KW - Male
KW - Adult
KW - Athletic Performance/physiology
KW - Lactic Acid/blood
KW - Young Adult
KW - Oxygen Consumption/physiology
KW - Fatigue
KW - Exercise Test
KW - Blood Glucose/analysis
KW - Physical Endurance/physiology
KW - Muscle Fatigue/physiology
U2 - 10.1111/sms.14699
DO - 10.1111/sms.14699
M3 - Journal article
C2 - 39011951
VL - 34
JO - Scandinavian Journal of Medicine & Science in Sports
JF - Scandinavian Journal of Medicine & Science in Sports
SN - 0905-7188
IS - 7
M1 - e14699
ER -
ID: 399574769