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Effect of time of day on aerobic contribution to the 30-s Wingate test performance.
Chronobiol Int 2007; 24(4):739-48CI

Abstract

The purpose of this study was to evaluate the effects of time of day on aerobic contribution during high-intensity exercise. A group of 11 male physical education students performed a Wingate test against a resistance of 0.087 kg . kg(-1) body mass. Two different times of day were chosen, corresponding to the minimum (06:00 h) and the maximum (18:00 h) levels of power. Oxygen uptake (.VO(2)) was recorded breath by breath during the test (30 sec). Blood lactate concentrations were measured at rest, just after the Wingate test, and again 5 min later. Oral temperature was measured before each test and on six separate occasions at 02:00, 06:00, 10:00, 14:00, 18:00, and 22:00 h. A significant circadian rhythm was found in body temperature with a circadian acrophase at 18:16+/-00:25 h as determined by cosinor analysis. Peak power (P(peak)), mean power (P(mean)), total work done, and .VO(2) increased significantly from morning to afternoon during the Wingate Test. As a consequence, aerobic contribution recorded during the test increased from morning to afternoon. However, no difference in blood lactate concentrations was observed from morning to afternoon. Furthermore, power decrease was greater in the morning than afternoon. Altogether, these results indicate that the time-of-day effect on performances during the Wingate test is mainly due to better aerobic participation in energy production during the test in the afternoon than in the morning.

Authors+Show Affiliations

Research Unit, Evaluation, Sport, Health, National Centre of Medicine and Science in Sport, Route de l'aéroport, Sfax 3000, Tunisia. n_souissi@yahoo.frNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17701684

Citation

Souissi, Nizar, et al. "Effect of Time of Day On Aerobic Contribution to the 30-s Wingate Test Performance." Chronobiology International, vol. 24, no. 4, 2007, pp. 739-48.
Souissi N, Bessot N, Chamari K, et al. Effect of time of day on aerobic contribution to the 30-s Wingate test performance. Chronobiol Int. 2007;24(4):739-48.
Souissi, N., Bessot, N., Chamari, K., Gauthier, A., Sesboüé, B., & Davenne, D. (2007). Effect of time of day on aerobic contribution to the 30-s Wingate test performance. Chronobiology International, 24(4), pp. 739-48.
Souissi N, et al. Effect of Time of Day On Aerobic Contribution to the 30-s Wingate Test Performance. Chronobiol Int. 2007;24(4):739-48. PubMed PMID: 17701684.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of time of day on aerobic contribution to the 30-s Wingate test performance. AU - Souissi,Nizar, AU - Bessot,Nicolas, AU - Chamari,Karim, AU - Gauthier,Antoine, AU - Sesboüé,Bruno, AU - Davenne,Damien, PY - 2007/8/19/pubmed PY - 2007/11/10/medline PY - 2007/8/19/entrez SP - 739 EP - 48 JF - Chronobiology international JO - Chronobiol. Int. VL - 24 IS - 4 N2 - The purpose of this study was to evaluate the effects of time of day on aerobic contribution during high-intensity exercise. A group of 11 male physical education students performed a Wingate test against a resistance of 0.087 kg . kg(-1) body mass. Two different times of day were chosen, corresponding to the minimum (06:00 h) and the maximum (18:00 h) levels of power. Oxygen uptake (.VO(2)) was recorded breath by breath during the test (30 sec). Blood lactate concentrations were measured at rest, just after the Wingate test, and again 5 min later. Oral temperature was measured before each test and on six separate occasions at 02:00, 06:00, 10:00, 14:00, 18:00, and 22:00 h. A significant circadian rhythm was found in body temperature with a circadian acrophase at 18:16+/-00:25 h as determined by cosinor analysis. Peak power (P(peak)), mean power (P(mean)), total work done, and .VO(2) increased significantly from morning to afternoon during the Wingate Test. As a consequence, aerobic contribution recorded during the test increased from morning to afternoon. However, no difference in blood lactate concentrations was observed from morning to afternoon. Furthermore, power decrease was greater in the morning than afternoon. Altogether, these results indicate that the time-of-day effect on performances during the Wingate test is mainly due to better aerobic participation in energy production during the test in the afternoon than in the morning. SN - 0742-0528 UR - https://www.unboundmedicine.com/medline/citation/17701684/Effect_of_time_of_day_on_aerobic_contribution_to_the_30_s_Wingate_test_performance_ L2 - http://www.tandfonline.com/doi/full/10.1080/07420520701535811 DB - PRIME DP - Unbound Medicine ER -