title: Effect of increasing maximal aerobic exercise on serum muscles enzymes in professional field hockey players.
abstract: OBJECTIVE
  Exercise results in oxidative enzyme increase and micro-injuries in skeletal muscles. The aim of this study was to investigate the effect of maximal aerobic exercise on serum muscle enzymes in professional field hockey players. This study aims to determine the effect of increasing maximal aerobic exercise on creatine kinase (CK), creatine kinase-MB (CK-MB), aspartate aminotransferase (AST) and alanine aminotransferase (ALT) serum levels.
  
  
  METHODS
  31 young professional field hockey players (13 female and 18 male players) volunteered for this study. All participants underwent the shuttle run test. Blood samples were taken from each participant before the shuttle run test. Post test blood samples were taken immediately after exercise and one hour after respectively. Pre and post test CK, CK-MB, AST and ALT values were measured by means of auto analyzer using original kits.
  
  
  RESULTS
  The acute post test measure of the CK level increased in male (p=0.002) and female (p=0.00) sportsmen. CK-MB values obtained one hour after the exercise was lower than those before the exercise in males (p=0.02). In females (p=0.017) and males (p=0.05) AST activity significantly increased immediately after exercise and decreased to resting activity 1 h recovery. ALT significantly increased immediately after exercise in female (p=0.03) and male (p=0.00) athletes and after 1 h recovery ALT activities decreased below resting values.
  
  
  CONCLUSIONS
  The timing and severity of exercise used in our study increased CK values, decreased CK-MB values and AST, ALT values increased in female and male field hockey players.
authors.forename: Muhsin
authors.initials: M
authors.lastname: Hazar
authors.affiliation: . otagaynur@gmail.com.
authors.forename: Aynur
authors.initials: A
authors.lastname: Otag
authors.forename: Ilhan
authors.initials: I
authors.lastname: Otag
authors.forename: Mehmet
authors.initials: M
authors.lastname: Sezen
authors.forename: Ozan
authors.initials: O
authors.lastname: Sever
mesh_terms: D000410:Alanine Transaminase / Q000097:blood / Q000378:metabolism*; D001219:Aspartate Aminotransferases / Q000097:blood / Q000378:metabolism*; D003402:Creatine Kinase / Q000097:blood / Q000378:metabolism*; D052279:Creatine Kinase, MB Form / Q000378:metabolism; D015444:Exercise / Q000502:physiology*; D005260:Female; D006688:Hockey / Q000502:physiology*; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000378:metabolism
chemical_list: D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D003402:Creatine Kinase; D052279:Creatine Kinase, MB Form