Effect of heat and heat acclimatization on cycling time trial performance and pacing

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Effect of heat and heat acclimatization on cycling time trial performance and pacing. / Racinais, Sebastien; Périard, Julien D; Karlsen, Anders; Nybo, Lars.

I: Medicine and Science in Sports and Exercise, Bind 47, Nr. 3, 2015, s. 601-606.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningfagfællebedømt

Harvard

Racinais, S, Périard, JD, Karlsen, A & Nybo, L 2015, 'Effect of heat and heat acclimatization on cycling time trial performance and pacing', Medicine and Science in Sports and Exercise, bind 47, nr. 3, s. 601-606. https://doi.org/10.1249/MSS.0000000000000428

APA

Racinais, S., Périard, J. D., Karlsen, A., & Nybo, L. (2015). Effect of heat and heat acclimatization on cycling time trial performance and pacing. Medicine and Science in Sports and Exercise, 47(3), 601-606. https://doi.org/10.1249/MSS.0000000000000428

Vancouver

Racinais S, Périard JD, Karlsen A, Nybo L. Effect of heat and heat acclimatization on cycling time trial performance and pacing. Medicine and Science in Sports and Exercise. 2015;47(3):601-606. https://doi.org/10.1249/MSS.0000000000000428

Author

Racinais, Sebastien ; Périard, Julien D ; Karlsen, Anders ; Nybo, Lars. / Effect of heat and heat acclimatization on cycling time trial performance and pacing. I: Medicine and Science in Sports and Exercise. 2015 ; Bind 47, Nr. 3. s. 601-606.

Bibtex

@article{bffb401f43de457dbb5ad725e4a2a132,
title = "Effect of heat and heat acclimatization on cycling time trial performance and pacing",
abstract = "PURPOSE: To determine the effects of heat-acclimatization on performance and pacing during outdoor cycling time-trials (TT, 43.4km) in the heat.METHODS: Nine cyclists performed 3 TTs in hot ambient conditions (TTH, ∼37ºC) on the first (TTH-1), sixth (TTH-2) and fourteenth (TTH-3) days of training in the heat. Data were compared to the average of two TTs in cool condition (∼8ºC) performed pre and post heat acclimatization (TTC).RESULTS: TTH-1 (77±6min) was slower (p=0.001) than TTH-2 (69±5min) and both were slower (p<0.01) than TTC and TTH-3 (66±3 and 66±4 min, respectively) without differences between TTC and TTH-3 (p>0.05). The cyclists initiated the first 20{\%} of all TTs at a similar power output, irrespective of climate and acclimatization status; however, during TTH-1 they subsequently had a marked decrease in power output, which was partly attenuated following six days of acclimatization and further reduced after fourteen days. HR was higher during the first 20{\%} of TTH-1 than in the other TTs (p<0.05), but there were no differences between conditions from 30{\%} onward. Final rectal temperature was similar in all TTHs (40.2±0.4ºC, p=1.000) and higher than in TTC (38.5±0.6ºC, p<0.001).CONCLUSION: Following two weeks of acclimatization, trained cyclists are capable of completing a prolonged TT in a similar time in the heat compared to cool conditions, whereas in the unacclimatized state they experienced a marked decrease in power output during the TTHs.",
author = "Sebastien Racinais and P{\'e}riard, {Julien D} and Anders Karlsen and Lars Nybo",
note = "CURIS 2015 NEXS 091",
year = "2015",
doi = "10.1249/MSS.0000000000000428",
language = "English",
volume = "47",
pages = "601--606",
journal = "Medicine and Science in Sports and Exercise",
issn = "0195-9131",
publisher = "Lippincott Williams & Wilkins",
number = "3",

}

RIS

TY - JOUR

T1 - Effect of heat and heat acclimatization on cycling time trial performance and pacing

AU - Racinais, Sebastien

AU - Périard, Julien D

AU - Karlsen, Anders

AU - Nybo, Lars

N1 - CURIS 2015 NEXS 091

PY - 2015

Y1 - 2015

N2 - PURPOSE: To determine the effects of heat-acclimatization on performance and pacing during outdoor cycling time-trials (TT, 43.4km) in the heat.METHODS: Nine cyclists performed 3 TTs in hot ambient conditions (TTH, ∼37ºC) on the first (TTH-1), sixth (TTH-2) and fourteenth (TTH-3) days of training in the heat. Data were compared to the average of two TTs in cool condition (∼8ºC) performed pre and post heat acclimatization (TTC).RESULTS: TTH-1 (77±6min) was slower (p=0.001) than TTH-2 (69±5min) and both were slower (p<0.01) than TTC and TTH-3 (66±3 and 66±4 min, respectively) without differences between TTC and TTH-3 (p>0.05). The cyclists initiated the first 20% of all TTs at a similar power output, irrespective of climate and acclimatization status; however, during TTH-1 they subsequently had a marked decrease in power output, which was partly attenuated following six days of acclimatization and further reduced after fourteen days. HR was higher during the first 20% of TTH-1 than in the other TTs (p<0.05), but there were no differences between conditions from 30% onward. Final rectal temperature was similar in all TTHs (40.2±0.4ºC, p=1.000) and higher than in TTC (38.5±0.6ºC, p<0.001).CONCLUSION: Following two weeks of acclimatization, trained cyclists are capable of completing a prolonged TT in a similar time in the heat compared to cool conditions, whereas in the unacclimatized state they experienced a marked decrease in power output during the TTHs.

AB - PURPOSE: To determine the effects of heat-acclimatization on performance and pacing during outdoor cycling time-trials (TT, 43.4km) in the heat.METHODS: Nine cyclists performed 3 TTs in hot ambient conditions (TTH, ∼37ºC) on the first (TTH-1), sixth (TTH-2) and fourteenth (TTH-3) days of training in the heat. Data were compared to the average of two TTs in cool condition (∼8ºC) performed pre and post heat acclimatization (TTC).RESULTS: TTH-1 (77±6min) was slower (p=0.001) than TTH-2 (69±5min) and both were slower (p<0.01) than TTC and TTH-3 (66±3 and 66±4 min, respectively) without differences between TTC and TTH-3 (p>0.05). The cyclists initiated the first 20% of all TTs at a similar power output, irrespective of climate and acclimatization status; however, during TTH-1 they subsequently had a marked decrease in power output, which was partly attenuated following six days of acclimatization and further reduced after fourteen days. HR was higher during the first 20% of TTH-1 than in the other TTs (p<0.05), but there were no differences between conditions from 30% onward. Final rectal temperature was similar in all TTHs (40.2±0.4ºC, p=1.000) and higher than in TTC (38.5±0.6ºC, p<0.001).CONCLUSION: Following two weeks of acclimatization, trained cyclists are capable of completing a prolonged TT in a similar time in the heat compared to cool conditions, whereas in the unacclimatized state they experienced a marked decrease in power output during the TTHs.

U2 - 10.1249/MSS.0000000000000428

DO - 10.1249/MSS.0000000000000428

M3 - Journal article

VL - 47

SP - 601

EP - 606

JO - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

SN - 0195-9131

IS - 3

ER -

ID: 130281583