Salah Ferchichi, Yana Taktak


The aim of this study is to see whether Ramadan fasting has an effect on the diurnal variations in anaerobic power and swimming performance or not. Ten participants whose mean ± SE for age, height, body mass are 19.4 ± 1.4 years, 1.72 ± 0.1 m and 72.8 ± 6.6 kg, respectively. They are tested at 3 testing periods [i.e., one week before Ramadan (BR), the middle period of Ramadan (MPR), the end period of Ramadan (EPR)], tests are performed at 07:00 h and 17:00 h throughout every course. The test sessions were started with oral temperature and body mass measurements. Regularly doing first the Wingate test then a 25-m swim at maximal speed at each test session. During the three experimental periods, dietary intake was assessed. The result shows a significant diurnal variation of muscle power and fatigue throughout the Wingate test before Ramadan. Likewise, there is a daily rhythm in the stroke parameters and swimming performance in the mentioned period. These diurnal variations change during the month of Ramadan with a decrease in power output, swim performance, swim speed and stroke length in the evening, with no changes for the morning tests. Moreover, the diurnal variations of muscle fatigue during the three morning tests show no changes and remain the same. Whereas the three evening tests show a gradual increase towards tiredness. The results show that Ramadan may has a great effect on the circadian rhythm of muscle power and swimming performance. The time-of-day effects the anaerobic power variables during the normal days which disappear during Ramadan. Ramadan fasting effects performance in the evening; however, the morning performance tests are unchangeable during Ramadan. Additionally, Ramadan fasting has no adverse effect on energy intake, and percentages of macronutrient intake.

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circadian variation, crawl, energy intake, stroke parameters, Wingate test

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Aloui, A., Chaouachi, A., Chtourou, H., Wong, DP., Haddad, M., Chamari, K., & Souissi N. (2013). Effects of Ramadan on the Diurnal Variations of Repeated Sprints Performances. Int J Sports Physiol Perform, 8(3), 254-262.

Al-Rawi, N., Madkour, M., Jahrami, H., Salahat, D., Alhasan, F., BaHammam, A., & Al-Islam Faris, M. (2020). Effect of diurnal intermittent fasting during Ramadan on ghrelin, leptin, melatonin, and cortisol levels among overweight and obese subjects: A prospective observational study. PloS one, 15(8), e 0237922.

Atkinson, G., & Reilly, T. (1996). Circadian variation in sports performance. Sports Med, 21(4), 292-312.

Beltaifa, L., Bouguerra, R., Ben Slama, C., Jabrane, H., El Khadhi, A., Rayana, B., Doghri, T. (2002). Food intake, and anthropometrical and biological parameters in adult Tunisians during Ramadan. EMHJ-Eastern Mediterranean Health Journal, 8(4-5), 603-611.

Bar-Or, O. (1987). The Wingate anaerobic test an update on methodology, reliability and validity. Sports Med, 4(6), 381–394.

Baxter, C., & Reilly, T. (1983). Influence of 4 times of day on all-out swimming. Br J Sports Med, 17(2), 122-127.

Bernard, T., Giacomoni, M., Gavarry, O., Seymat, M., & Falgairette, G. (1998). Time-of-day effects in maximal anaerobic leg exercise. Eur. J. Appl. Physiol, 77(1-2), 133-138.

Bessot, N., Moussay, S., Clarys, JP., Gauthier, A., Sesboüé, B., & Davenne, D. (2007). The influence of circadian rhythm on muscle activity and efficient force production during cycling at different pedal rates. J Electromyogr Kinesiol, 17(2), 176-83.

Bigard, A. X., Boussif, M., Chalabi, H., & Guezennec, C. Y. (1998). Alterations in muscular performance and orthostatic tolerance during Ramadan. Aviation Space and Environmental Medicine, 69(4), 341-346.

Bogdanis, G. C., Nevill, M. E., Lakomy, H. K., & Boobis, L. H. (1998). Power output and muscle metabolism during and following recovery from 10 and 20 s of maximal sprint exercise in humans. Acta Physiol. Scand, 163(3), 261-272.

Boukhris, O., Hsouna, H., Chtourou, L., Abdesalem, R., BenSalem, S., Tahri, N., Trabelsi, K., Stannard, S. R., Chtourou, H. (2019). Effect of Ramadan fasting on feelings, dietary intake, rating of perceived exertion and repeated high intensity short-term maximal performance. Chronobiology international, 36(1), 1-10.

Chaouachi, A., Coutts, A. J., Chamari, K., Wong, Del P., Chaouachi, M., Chtara, M., Roky, R., & Amri, M. (2009b). Effect of Ramadan intermittent fasting on aerobic and anaerobic performance and perception of fatigue in male elite judo athletes. J Strength Cond Res, 23(9), 2702-2709.

Chaouachi, A., Leiper, J. B., Souissi, N., Coutts, A. J., & Chamari, K. (2009a). Effects of Ramadan intermittent fasting on sports performance and training: A Review . Int J Sports Physiol Perform, 4(4), 419-434.

Chollet, D., Chalies, S., & Chatard, J. C. (2000). New index of coordination for the crawl: Description and usefulness. Int J Sports Med, 21(1), 54-59.

Chtourou, H., & Souissi, N. (2012). The effect of training at a specific time-of-day: a review. J Strength Cond Res, 26(7), 1984–2005.

Chtourou, H., Hammouda, O., Souissi, H., Chamari, K., Chaouachi, A., & Souissi, N. (2011). The effect of Ramadan fasting on physical performances, mood state and perceived exertion in young footballers. Asian J Sports Med, 2(3), 177-185.

Costill, D. L., Kovaleski, J., Porter, D., Kirwan, J., Fielding, R., & King, D. (1985). Energy expenditure during front crawl swimming: Predicting success in middle-distance events. Int J Sports Med, 6(5), 266-270.

Craig, A. B., & Pendergast, D. R. (1979). Relationships of stroke rate, distance per stroke, and velocity in competitive swimming. Med Sci Sports Exerc, 11(3), 278-283.

Drust, B., Waterhouse, J., Atkinson, G., Edwards, B., & Reilly, T. (2005). Circadian rhythms in sports performance-an update. Chronobiol Int, 22(1), 21-44.

Fedail, S. S., Murphy, D., Salih, S. Y., Bolton, C. H., & Harvey, R. F. (1982). Changes in certain blood constituents during Ramadan. Am J Clin Nutr, 36(2), 350-353.

Ferchichi, S., Taktak, H., Taktak, Y., Zarrouk, F., Tabka, Z., & Souissi, N. (2015). Diurnal variation in stroke parameters and motor organization in front-crawl swimmers. Biological Rhythm Research, 46(6), 887-895.

Ferchichi, S., Taktak, Y., Taktak, H., Chtourou, H., Zarrouk, F., Tabka, Z., & Souissi, N. (2016). The effect of training at the same time-of-day on the diurnal variations of technical ability and swimming performance. Biological Rhythm Research, 47(3), 447-461.

Gaitanos, G. C., Williams, C., Boobis, L. H., & Brooks, S. (1993). Human muscle metabolism during intermittent maximal exercise. J. Appl. Physiol, 75(2), 712-719.

Granier, P., Mercier, B., Mercier, J., Anselme, F., & Préfaut, C. (1995). Aerobic and anaerobic contribution to Wingate test performance in sprint and middle-distance runners. Eur J Appl Physiol, 70(1), 58–65.

Gueldich, H., Zghal, F., Borji, R., Chtourou, H., Sahli, S., Rebai, H. (2019). The effects of Ramadan intermittent fasting on the underlying mechanisms of force production capacity during maximal isometric voluntary contraction. Chronobiology International, 36(5), 698-708.

Hallak, M. H., & Nomani, M. Z. (1988). Body weight loss and changes in blood lipid levels in normal men on hypocaloric diets during Ramadan fasting. Am J Clin Nutr, 48(5), 1197–1210.

Hammouda, O., Chtourou, H., Aloui, A., Chahed, H., Kallel, C., Miled, A., Chamari, K., Chaouachi, A., & Souissi, N. (2013). Concomitant Effects of Ramadan Fasting and Time-Of-Day on Apolipoprotein AI, B, Lp-a and Homocysteine Responses during Aerobic Exercise in Tunisian Soccer Players. PLOS One, 8(11), e79873.

Hill, D. W., & Smith, J. C. (1991). Circadian rhythm in anaerobic power and capacity. Can J Sport Sci, 16(1), 30–32.

Horne J. A., & Ostberg O. (1976). A self-assessment questionnaire to determine morningness-eveningness in human circadian rhythms. Int. J. Chronobiol, 4(2), 97-110.

Horne, J. A., Brass, C. G., & Pettitt, A. N. (1980). Circadian performance differences between morning and evening "types". Ergononmics, 23(1), 29-36.

Karli, U., Guvenc, A., Aslan, A., Hazir, T., & Acikada, C. (2007). Influence of Ramadan fasting on anaerobic performance and recovery following short time high intensity exercise . J Sports Sci Med, 6(4), 490–497.

Kerkhof, G. A., Korving, H. J., Willemse-vd Geest, H. M., & Rietveld, W. J. (1980). Diurnal differences between morning-type and evening-type subjects in self-rated alertness, body temperature and the visual and auditory evoked potential. Neurosci Lett, 16(1), 11-15.

Kline, C. E., Durstine, J. L., Davis, J. M., Moore, T. A., Devlin, T. M., Zielinski, M. R., & Youngstedt, S. D. (2007). Circadian variation in swim performance. J Appl Physiol, 102(2), 641-649.

Kul, S., Savas, E., Oztürk, Z. A., & Karadag, G. (2014). Does Ramadan fasting alter body weight and blood lipids and fasting blood glucose in a healthy population? A meta-analysis. J Relig Health, 53(3), 929-942.

Küüsmaa-Schildt, M., Liukkonen, J., Vuong, M. K., Nyman, K., Häkkinen, K., Häkkinen, A. (2019). Effects of morning vs evening combined strength and endurance training on physical performance, sleep and well-being. Chronobiology International, 36(6), 811-825.

Lericollais, R., Gauthier, A., Bessot, N., Sesboüé, B., & Davenne, D. (2009). Time-of-day effects on fatigue during a standard anaerobic test in well-trained cyclists. Chronobiol Int, 26(8), 1622-1635.

Linsell, C. R., Lightman, S. L., Mullen, P. E., Brown, M. J., & Causon, R. C. (1985). Circadian rhythms of epinephrine and norepinephrine in man. J. Clin. Endocrinol. Metab, 60(6), 1210–1215.

López-Samanes, Á., Moreno-Pérez, D., Maté-Muñoz, J. L., Domínguez, R., Pallarés, J. G., Mora-Rodriguez, R., & Ortega, J. F. (2017). Circadian rhythm effect on physical tennis performance in trained male players. Journal of sports sciences, 35(21), 2121-2128.

Meckel, Y., Ismaeel, A., & Eliakim, A. (2008). The effect of the Ramadan fast on physical performance and dietary habits in adolescent soccer players. Eur J Appl Physiol, 102(6), 651–657.

Melhim, A. F. (1993). Investigation of circadian rhythms in peak power and mean power of female physical education students. Int. J. Sports Med, 14(6), 303-306.

Natale, V., & Cicogna, P. (1996). Circadian regulation of subjective alertness in morning and evening "types". Person Individ Diff, 20(4), 491-497.

Nicolas, A., Gauthier, A., Bessot, N., Moussay, S., & Davenne, D. (2005). Time-of-day effects on myoelectric and mechanical properties of muscle during maximal and prolonged isokinetic exercise. Chronobiol Int, 22(6), 997-1011.

Racinais, S., Chamari, K., Hachana, Y., Bartagi, Z., Blonc, S., & Hue, O. (2006). Effect of acute and dry exposure in moderately warm and humid environment on muscle performance at different times of day. Int J Sports Med, 27(1), 49–54

Refinetti, R., Kaufman, C. M., & Menaker, M. (1994). Complete suprachiasmatic lesions eliminate circadian rhythmicity of body temperature and locomotor activity in golden hamsters. J. Comp of Physiol A, 175, 223-232.

Reilly, T., & Down, A. (1992). Investigation of circadian rhythms in anaerobic power and capacity of the legs. J. Sports. Med. Phys. Fitness, 32(4), 343–347.

Reilly, T., Atkinson, G., Edwards, B., Waterhouse, J., Farrelly, K., & Fairhurst, E. (2007). Diurnal variation in temperature, mental and physical performance, and tasks specifically related to football (soccer). Chronobiol Int, 24(3), 507-519.

Roky, R., Chapotot, F., Hakkou, F., Benchekroun, M. T., & Buguet, A. (2001). Sleep during Ramadan intermittent fasting. J Sleep Res, 10(4), 319–327.

Rossi, A., Formenti, D., Vitale, J. A., Calogiuri, G., & Weydahl, A. (2015). The Effect of Chronotype on Psychophysiological Responses during Aerobic Self-Paced Exercises. Perceptual and Motor Skills, 121(3), 840-855.

Shephard, R. J. (1984). Sleep, biorhythms and human performance. Sports Med, 1(1), 11-37.

Souissi, N., & Davenne, D. (2004). Circadian rhythms and anaerobic performance. Sci Motricité, 53, 39-55.

Souissi, N., Driss, T., Chamari, K., Vandewalle, H., Davenne, D., Gam, A., Fillard, J. R., & Jousselin, E. (2010). Diurnal variation in Wingate test performance: influence of active warm up. Chronobiol Int, 27(3), 640- 652.

Souissi, N., Gauthier, A., Sesboüé, B., Larue, J., & Davenne, D. (2004). Circadian rhythms in two types of anaerobic cycle leg exercise: Force-velocity and 30-s Wingate tests. Int J Sports Med, 25(1), 14–19.

Souissi, N., Gauthier, A., Sesboüé, B., Larue, J., & Davenne, D. (2002). Effects of regular training at the same time of day on diurnal fluctuations in muscular performance. Journal of Sports Sciences, 20(11), 929-937.

Souissi, N., Souissi, H., Sahli, S., Tabka, Z., Dogui, M., Ati, J., Davenne, D. (2007). Effect of Ramadan on the diurnal variation in short-term high power output. Chronobiol Int, 24(5), 991-1007.

Susman, E. J., Dockray, S., Schiefelbein, V. L., Herwehe, S., Heaton, J. A., & Dorn, L. D. (2007). Morningness/eveningness, morning-to-afternoon cortisol ratio, and antisocial behavior problems during puberty. Dev Psychol, 43(4), 811-822.

Taileb, S., & Saidaissa, K. (2018). Impact De L’exercice Aerobie Combine Au Jeune Du Ramadan Sur Quelques Indices Biologiques Lies A La Sante Chez Les Femmes/Impact Of Combined Aerobics Exercise During Ramadan On Some Related Biological Health Indices In Women. European Journal of Physical Education and Sport Science.

Tiwari, L. M., & Deol, N. S. (2016). Diurnal Variation on The Performance of Coordinative Abilities of Soccer Players. European Journal of Physical Education and Sport Science.

Vitale, J. A., & Weydahl, A. (2017). Chronotype, physical Activity, and Sport Performance: A Systematic Review. Sports Med, 47(9), 1859-1868.

Waterhouse, J. (2010). Effects of Ramadan on physical performance: chrono-biological considerations. Br J Sports Med, 44(7), 509-515.

Wilson, D., Drust, B., & Reilly, T. (2009). Is diurnal lifestyle altered during Ramadan in professional Muslim athletes? Biol Rhythms Res, 40(5), 385-397.

Zerguini, Y., Kirkendall, D., Junge, A., & Dvorak, J. (2007). Impact of Ramadan on physical performance in professional soccer players. Br J Sports Med, 41(6), 398–400.



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