Document Type : Original research study
Author
Abstract
The study investigated effects of mild dehydration on selective and sustained attention. 22 female students participated in a quasi-experimental study. Convenience sampling was used and participants were assigned to three basic, hydration, and dehydration conditions, counterbalancelly. In the basic condition, they had no physical activity, but in hydration and dehydration conditions, they completed a 60-minute exercise protocol of walking on a treadmill and bicycling. Data were collected using Simple Stroop and Continuous Performance Test V.4. A significant main effect was found for exercise condition. No interaction was found for exercise condition and attention. In dehydrated condition, selective and sustained attention’s mean scores were higher than control and hydrated conditions (p<0.05). However, no significant difference (p>0.05) was found between selective and sustained attention’s mean scores in control and hydrated conditions. Accordingly, mild dehydration affected selective and sustained attention. Therefore, it seems necessary to consider optimal hydration during exercise .
Keywords
1. Adan, A. (2012). Cognitive performance and dehydration. Journal of the American College of Nutrition, 31(2), Pp:71-78.
2. Arjmandi-Beglar, Nejati, Najafi, & Kupayee. (2012). The effects of coronary artery bypass graft on selective attention, shifting attention, and sustained attention. Ann Biol Res, 3, Pp:2028-2033.
3. Armstrong, A. (2011). Mild Dehydration Affects Mood in Healthy Young Women. Ingestive Behavior and Neurosciences.
4. Bahrami, a.and Chlongariyan, nasrin. (2014). Attention in sports (Vol. 1). tehran: sport sciences research institute.
5. Carrasco, A. (2008). Effects of exercise-induced dehydration on cognitive ability, muscular endurance and surfing performance. (degree of Master of Science in Sport and Exercise Science), Massey University, Auckland, New Zealand.
6. Conrad, C. (2010). A critical review of chronic stress effects on spatial learning and memory. Progress in Neuro- Psychopharmacology and Biological Psychiatry, 34(5),Pp: 742-755.
7. Czéh, B., Perez-Cruz, C., Fuchs, E., & Flügge, G. (2008). Chronic stress-induced cellular changes in the medial prefrontal cortex and their potential clinical implications: does hemisphere location matter? Behavioural brain research, 190(1),Pp: 1-13.
8. Dallman, M. (2005). Fast glucocorticoid actions on brain: back to the future. Frontiers in neuroendocrinology, 26(3),Pp: 103-108.
9. Fadda, R., Rapinett, G., Grathwohl, D., Parisi, M., Fanari, R., Calò, C., & Schmitt, J. (2012). Effects of drinking supplementary water at school on cognitive performance in children. Appetite, 59(3),Pp: 730-737.
10. Falcone, P., Tai, C., Carson, L., Joy, J., Mosman, M., Straight, J.L, . . . Griffin, J. (2014). Sport-specific reaction time after dehydration varies between sexes. Journal of the International Society of Sports Nutrition, 11(Suppl 1), Pp:29.
منابع
11. Fox, E., & Donald, M. (2009). Sport physiology (a. Khaledan, Trans. 7 ed. Vol. 2). Tehran: University of Tehran.
12. Ganio, M., Armstrong, L., Douglas J. C & McDermott, B. (2011). Mild dehydration impairs cognitive performance and mood of men. Nutrition, 106, Pp:1535–1543.
13. Haji-Rasouli, masoud. (2007). Focus and Attention Applied Sport Psychology (Vol. 1, pp. 137-160): Printing and distribution Organization of Islamic Azad University.
14. Hardy, l., Jones, G., & Gould, D. (2006). Mental preparation for professional athletes: chekameh.
15. Lieberman,h. (2007). Hydration and cognition:a critical review and recommendations for future research. J Am Coll Nutr, 26,Pp: 555-561.
16. Hudson, L. (2013). The Effect Of Moderate Exercise Induced Dehydration on Cognitive Performance On The Impact Test in Ncaa division iii collegiate wrestler (Degree of Master of Science in Human Performance), College of Science and Health Human Perfolluance University of wisconsin-la crosse.
17. Karslo, R. (2011). Individual and Combined Effects of Dehydration, Hyperthermia, and Fatigue on Movement Patterns and Cognition. (Master of Arts), Connecticut.
18. Kempton, Matthew J, Ettinger, Ulrich, Foster, Russell, Williams, Steven CR, Calvert, Gemma A, Hampshire, Adam, . . . Owen, Adrian M. (2011). Dehydration affects brain structure and function in healthy adolescents. Human brain mapping, 32(1),Pp: 71-79.
19. Khodadadi, mojtaba, Mashhadi, ali, & Amani, hossein. (2014a). continuous performance test software. Institye for behaviorsl and cognitive science,Pp: 1-2. In persian.
khodadadi, mojtaba, mashhadi, ali, & amani, hossein. (2014b). simple stroop software. institye for behaviorsl and cognitive science,Pp: 1-2. In Persian.
20. Baker, D., Conroy,l. & Kenney,w. (2007). Dehydration impairs vigilancerelated attention in male basketball players. Medicine & Science in Sports & Exercise, 39,Pp: 976-983.
21. Lieberman, H., Bathalon, G., Falco, C., Kramer, F., Morgan, C.,. & P, Niro. (2005). Severe decrements in cognition function and mood induced by sleep loss, heat, dehydration, and undernutrition during simulated combat. Biol Psychiatry, 57, 422-429.
22. Mark h, a. (2007). Sports psychology from theory to practice (a. a. Mosaded, Trans.). Tehran: Information.Pp:25.
23. Masento, N., Golightly, M., Field, D., Butler, L., & van Reekum, C.. (2014). Effects of hydration status on cognitive performance and mood. British Journal of Nutrition, 111(10),Pp: 1841-1852.
24. McEwen, B. (2004). Protection and damage from acute and chronic stress: allostasis and allostatic overload and relevance to the pathophysiology of psychiatric disorders. Annals of the New York Academy of Sciences, 1032(1),Pp: 1-7.
25. Moquin, A., & Mazzeo, R. (2000). Effect of mild dehydration on the lactate threshold in women. Medicine and science in sports and exercise, 32(2), Pp:396-402.
26. Mougios, V. (2006). Exercise biochemistry: Human Kinetics.
27. Moyen, N., Ganio, M., Wiersma, L., Kavouras, S., Gray, M., McDermott, B.& McKenzie, A.. (2015). Hydration status affects mood state and pain sensation during ultra-endurance cycling. Journal of sports sciences(ahead-of-print),Pp: 1-8.
28. Nejati, v., & Izadi, s. (2013). Comparison of executive functions in autistic children with high and Normal performance. Research in Rehabilitation Sciences, 1,Pp: 1-12.In Persian.
29. Nejati, v., Zabihzade, a., & Nikfarjam, m. (2013). The relationship between mindfulness and functions of sustained and selective attention Journal of Cognitive and Behavioral Sciences, 2,Pp: 31-42.In Persian.
30. Nezakat-alhosseini, m, & Jaberi, ar. (2015). Sport and exercise psychology. isfahan: university of isfahan.
31. Patel, A., Mihalik, J., Notebaert, A., Guskiewicz, K. & Prentice, W.. (2007). Neuropsychological performance, postural stability, and symptoms after dehydration. Journal of athletic training, 42(1),Pp: 66.
32. Pross, N., Demazieres, A., Girard, N., Barnouin, R., Santoro, F.e, Chevillotte, E. Le Bellego, L. (2013). Influence of progressive fluid restriction on mood and physiological markers of dehydration in women. British Journal of Nutrition, 109(02),Pp: 313-321.
33. Ron. Z., Michelle. C., Rebecca L., Leon J., and Bryan Moseley. Cognitive Performance May be Impaired by Exercise in a Hot, Humid Environment: A Preliminary Investigation. Florida International University, USA.
34. Salmela, j, Saneti monfared, s, Mosayebi, & Bush. (2009). Mental skill profiles and expertise levels of elite iranian athletes. journal of sport psychology, 39, Pp: 361-373.
35. shahsavarani, A., Rasoulzadeh, k., Ashayeri, H., & Satari, K.. (2011). The impact of stress on selective attention and visual focus with regard to its effect on teaching and learning. New Thoughts on Education 4(6),pp: 169-194. In Persian.
36. VaezMousavi, M., & Mosayebi, f.. (2008). Focus and Attention Sport psychology (Vol. 1, pp. 186-207). tehran: samt.
37. Watson, S. (2013). Effect of Dehydration on Concomitant Measures of Cognitive Function and Balance. (Professional Papers), University of Nevada, Las Vegas.
38. Weinberg, R., & Gould, D. (2014). Foundations of Sport and Exercise Psychology, 6E: Human Kinetics.
)