article information

Asian Journal of Sports Medicine: Vol.3, issue 3; 139-144
published online: August 31, 2012
article type: Research Article
received: January 8, 2012
accepted: April 12, 2012
DOI: https://doi.org/10.5812/asjsm.34604
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Diurnal Variations in Physical Performances Related to Football in Young Soccer Players

authors:

avatar Hamdi Chtourou ORCID 2 , * , avatar Omar Hammouda 1 , avatar Hichem Souissi 1 , avatar Karim Chamari 3 , avatar Anis Chaouachi 1 , avatar Nizar Souissi 3

Research Unit, High Institute of Sport and Physical Education, Sfax University, Tunisia
Research Laboratory Sports performance Optimization National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
High Institute of Sport and Physical Education, Ksar-Sad, Manouba University, Tunisia

how to cite: Chtourou H, Hammouda O, Souissi H, Chamari K, Chaouachi A, et al. Diurnal Variations in Physical Performances Related to Football in Young Soccer Players. Asian J Sports Med. 2012;3(3):34604. https://doi.org/10.5812/asjsm.34604.

Abstract

Purpose:

This study investigated the effects of time-of-day on aerobic and anaerobic performances during the Yo-Yo, repeated sprint ability (RSA) and the Wingate tests in young soccer players.

Methods:

In a counterbalanced and a random order, twenty junior male soccer players completed the Yo-Yo, the RSA, and the Wingate tests at two different times-of-day: 07:00 and 17:00 h. During the Yo-Yo test, the total distance (TD) covered and the estimated maximal aerobic velocity (MAV) were determined. The peak power (PP) during each sprint, the percentage of decrement of PP (PD) and total work (Wtotal) during the RSA test were, also, measured. In addition, during the Wingate test, the peak (Ppeak) and mean (Pmean) powers were recorded.

Results:

During the Wingate test, Ppeak and Pmean were significantly higher at 17:00 than 07:00 h (P<0.05) with diurnal gains of 3.13.6 and 2.93.5% respectively. During the RSA test, PP during the first two sprints, Pdec and Wtotal were, also, higher in the evening (P<0.05) with amplitudes of 4.84.6, 3.13.0, 13.132.1, and 4.12.5% respectively. Likewise, TD and MAV during the Yo-Yo test were higher at 17:00 than 07:00 h with diurnal gains of 13.110.7 and 4.23.3 respectively.

Conclusions:

The present study confirms the daily variations of both aerobic and anaerobic performances during the Yo-Yo, the RSA, and the Wingate tests in trained young Tunisian soccer players.

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