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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
medicine
Effects of Ramadan on the diurnal variations of repeated-sprint performance
International Journal of Sports Physiology and Performance, Volume 8, No. 3, Year 2013
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Description
Purpose: This study examined the effects of Ramadan on cycling repeated-sprint ability (RSA) and corresponding diurnal variations. Methods: Twelve active men performed an RSA test (5 × 6-s maximal sprints interspersed with 24 s passive recovery) during morning and afternoon sessions 1 wk before Ramadan (BR), during the second (R2) and the fourth (R4) weeks of Ramadan, and 2 wk after Ramadan (AR). Maximal voluntary contraction was assessed before (MVCpre), immediately after (MVCpost), and 5 min after the RSA test (MVCpost5). Moreover, hematocrit, hemoglobin, and plasma sodium and potassium (K+) concentrations were measured at rest and after the RSA test and MVCpost. Results: Overall, peak power (Ppeak) during the RSA test decreased throughout the 5 sprints. Ppeak measured in the first sprint and MVCpre were lower during Ramadan than BR in the afternoon (P < .05) and higher in the afternoon than the morning BR and AR (P < .05). However, this diurnal rhythmicity was not found for the last 4 sprints' Ppeak, MVCpost, and MVCpost5 in all testing periods. Furthermore, the last 4 sprints' Ppeak, MVCpost, MVCpost5, and morning MVC pre were not affected by Ramadan. [K+] measured at rest and after the RSA test and MVCpost were higher during Ramadan than BR in the afternoon (P < .05) and higher in the afternoon than the morning during Ramadan (P < .05). Conclusions: Fatigability is higher in the afternoon during Ramadan, and, therefore, training and competition should be scheduled at the time of day when physical performance is less affected. © 2013 Human Kinetics, Inc.
Authors & Co-Authors
Aloüi, Asma
Tunisia, Sfax
Institut Supérieur du Sport et de L'education Physique de Sfax
Chaouachi, Anis
Tunisia, Tunis
National Center of Medicine and Sciences in Sport
Cthourou, Hamdi C.
Tunisia, Tunis
National Center of Medicine and Sciences in Sport
Wong, Del Pui Lam
Hong Kong, Hong Kong
Technological and Higher Education Institute of Hong Kong
Haddad, Monoem
Tunisia, Tunis
National Center of Medicine and Sciences in Sport
Chamari, K.
Qatar, Doha
Aspetar Orthopaedic and Sports Medicine Hospital
Souissi, Nizar
Tunisia, Manouba
Université de la Manouba
Statistics
Citations: 81
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1123/ijspp.8.3.254
ISSN:
15550265
Participants Gender
Male