9 International Journal for Modern Trends in Science and Technology Effects of Cold-Water Immersion on Muscle Damage and Function in Male Soccer Players after Soccer-Like Competition Mohammad Reza Mardnik 1 | Javad Vakili 2 | Ali Mohammadnabi 3 | Reza Omidi Ghanbari 4 | Ali Khezri 5 1,3,5 Master of Exercise Physiology, University of Payamnour Alborz Branch, Iran. 2 Ph.D, Faculty Member of Law Department, University of Payamnour Alborz Branch, Iran. 4 Exercise Physiology Ph.D Student at Azad University of Borouherd, Iran. To Cite this Article Mohammad Reza Mardnik, Javad Vakili, Ali Mohammadnabi, Reza Omidi Ghanbari and Ali Khezri, DzEffects of Cold-Water Immersion on Muscle Damage and Function in Male Soccer Players after Soccer-Like Competitiondz, International Journal for Modern Trends in Science and Technology, Vol. 04, Issue 01, January 2018 2017, pp.-09-15. One of the most important concerns for coaches and athletes of football field is the limited interval between sport activities for physiological recovery and restore muscle to condition before exercise. Therefore, present study has been conducted aimed at examining the influence of recovering in cold water on some male soccer player's functional and muscle damage indexes, following a quasi-football game, among Arias Athletic and Cultural Club in Tehran, Iran. Statistical population of the current study consists of soccer players ranging from 18 to 29 years of age and statistical sample includes a number of 30 male soccer players available in Arias Athletic and Cultural Club. Recovery in cold water is independent variable and muscular damage indexes include Serum Creatine Kinase and Serum dehydrogenase and functional indexes, including functional power and muscle strength, are considered as dependent variables. Findings of the study indicate that lower CK was seen in group of recovery in cold water than control group after 24 hours of recovery period. Significant reduction in LDH level was only observed for group of recovery in cold water than control one after 24 hours recovery period. After 24 hours recovery period, significant difference was seen in Sargent Jump value for group of recovery in cold water than control one. For hand claw power, type of recovery has no impact on hand power during various steps of measurement. KEYWORDS: recovery, soccer players, muscle damage Copyright © 2017 International Journal for Modern Trends in Science and Technology All rights reserved. I. INTRODUCTION Most players in a 90 minute soccer match usually run 10 to 12 kilometers at an intensity close to anaerobic threshold (80–90% of maximal heart rate or 70-80 percent of the maximal oxygen uptake) (Hoff et al, 2002). Regarding the nature of football, this sport is classified as an intense and periodic group exercise, the type of activity changes every 4 to 6 seconds, and professional players have roughly 1,350 movements in a football match, which involve 220 running movements at high speed in short distance (Mohr et al, 2005). The major part of the players' activity during the 90 minutes, are light and aerobic, and less of their activities are intense and anaerobic, but these low percentages determine the outcome of the match and the difference between good players and other players (Donald, 2009).A tough tournament or ABSTRACT Available online at: http://www.ijmtst.com/vol4issue1.html International Journal for Modern Trends in Science and Technology ISSN: 2455-3778 :: Volume: 04, Issue No: 01, January 2018