Author/Authors :
Trabelsi, Khaled Laboratory of Cardio-Circulatory - Respiratory, Metabolic and Hormonal Adaptations to the Muscular Exercise - Faculty of Medicine Ibn El Jazzar, Tunisia , Rebai, Haithem Laboratory of Cardio-Circulatory - Respiratory, Metabolic and Hormonal Adaptations to the Muscular Exercise - Faculty of Medicine Ibn El Jazzar, Tunisia , el-Abed, Kais Laboratory of Cardio-Circulatory - Respiratory, Metabolic and Hormonal Adaptations to the Muscular Exercise - Faculty of Medicine Ibn El Jazzar, Tunisia , Stannard, Stephen R. Institute of Food - Nutrition and Human Health - Massey University, New Zealand , Khannous, Hamdi Laboratory of Pharmacology - Faculty of Medicine, Tunisia , Masmoudi, Liwa Laboratory of Pharmacology - Faculty of Medicine, Tunisia , Sahnoun, Zouheir Laboratory of Pharmacology - Faculty of Medicine, Tunisia , Hakim, Ahmed Laboratory of Pharmacology - Faculty of Medicine, Tunisia , Fellman, Nicole Laboratory of Sports Biology - Faculty of Medicine - ULaboratory of Sports Biology - Faculty of Medicine - University of Auvergne, Clermont-Ferrand, Franceniversity of Auvergne - Department of Sports Medicine, CHU of Clermont- Ferrand, France , Tabka, Zouhair Laboratory of Cardio-Circulatory - Respiratory, Metabolic and Hormonal Adaptations to the Muscular Exercise - Faculty of Medicine Ibn El Jazzar, Tunisia
Abstract :
Purpose: To evaluate the effect of Ramadan fasting on body water status
markers of rugby players at basal condition and following a simulation of
rugby sevens match.
Methods: Twelve recreational rugby sevens players played three matches:
one day before Ramadan (before Ramadan), at the end of the first week of
Ramadan (Beg-R) and at the end of Ramadan (End-R). Before and
immediately after each match, body weight was determined and blood
samples were taken for the measurement of body water status markers.
Total body water was measured with an impedancemeter only before
matches.
Results: At rest, an increase in hematocrit (+4.4%, P=0.03), hemoglobin
(+3.4%, P=0.01) and plasma osmolarity (+2.8%, P<0.001) was noticed at
End-R compared to before Ramadan. Total body water measured before
Ramadan did not differ significantly from that of Ramadan. After the
match, values of hematocrit and plasma osmolarity increased significantly
at End-R (+1.4%, P=0.02; +3.1%, P<0.001 respectively) compared to
before Ramadan. Although, hemoglobin measured after matches occurring
during Ramadan did not differ from those of before Ramadan. In response
to matches, the change of percentage of body water status markers did not
differ during each period of the investigation.
Conclusions: The present results show that Ramadan fasting induces
dehydration at basal conditions. Also, rugby sevens match played during
Ramadan did not exacerbate the magnitude of responses to matches of
blood and body water status markers.
Keywords :
Islamic Fasting , Total Body Water , Dehydration , Intermittent Exercise
