Search tips
Search criteria 


Logo of asjsmThis JournalSearchAim and ScopeAuthor GuidelinesSubmit a ManuscriptTUMSThis journal
Asian J Sports Med. Sep 2012; 3(3): 161–168.
PMCID: PMC3445643
Effects of Morning Caffeine’ Ingestion on Mood States, Simple Reaction Time, and Short-Term Maximal Performance on Elite Judoists
Makram Souissi, PhD,1,2 Salma Abedelmalek, PhD,2,3 Hamdi Chtourou, PhD,*2,4 Rim Atheymen, MD,1 Ahmed Hakim, MD,1 and Zouhair Sahnoun, MD1
1Laboratory of Pharmacology, Faculty of medicine, University of Sfax, Tunisia
2Research Unit, High Institute of Sport and Physical Education, University of Sfax, Tunisia
3Department of Physiology, Faculty of Medicine, University of Sousse, Tunisia
4Research Laboratory “Sports performance optimization” National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia
*Corresponding Author:Address: National Center of Medicine and Science in Sports, Bp263, Ave Med Ali Akid, 1004 El Menzah, Tunis, Tunisia. E-mail:h_chtourou/at/
Received January 1, 2012; Accepted February 15, 2012.
The purpose of the present study was to evaluate the ergogenic effect of caffeine ingestion on mood state, simple reaction time, and muscle power during the Wingate test recorded in the morning on elite Judoists.
Twelve elite judoists (age: 21.08 ± 1.16 years, body mass: 83.75 ± 20.2 kg, height: 1.76 ±6.57 m) participated in this study. Mood states, simple reaction time, and muscle power during the Wingate test were measured during two test sessions at 07:00 h and after placebo or caffeine ingestion (i.e. 5 mg/kg). Plasma concentrations of caffeine were measured before (T0) and 1-h after caffeine’ ingestion (T1) and after the Wingate test (T3).
Our results revealed an increase of the anxiety and the vigor (P<0.01), a reduction of the simple reaction time (P<0.001) and an improvement of the peak and mean powers during the Wingate test. However, the fatigue index during this test was unaffected by the caffeine ingestion. In addition, plasma concentration of caffeine was significantly higher at T1 in comparison with T0.
In conclusion, the results of this study suggest that morning caffeine ingestion has ergogenic properties with the potential to benefit performance, increase anxiety and vigor, and decrease the simple reaction time.
Keywords: Caffeine, Anaerobic Performance, Simple Reaction Time, Mood States
Articles from Asian Journal of Sports Medicine are provided here courtesy of
Tehran University of Medical Sciences