THE EFFECTS OF PHYSICAL EXERCISE ON SOME PLASMA ENZYMES AND Ca AND P LEVELS IN RACE HORSES

In this study nine two-year old, male, English horses which trot 5400 m in 10 minutes on dry sand and closed manage were used. The changes in plasma Aspartate-aminotransferase (AST), Alanine-aminotransferase (ALT), Gamma-glutamy I transferase (GGT), Alkaline-phosphatase (ALP), Calcium (Ca) and Phosphorus (P) levels were measured in blood samples which were taken before (at 0 min), at the 5th minute, right after (at 10th min) and 1/2, 6, 12 and 24 hours after the exercise. Although plasma AST, ALP and GGT values were slightly higher in post-exercise period, the differences were not significant statistically in comparison to the preexercise levels. And also changes in plasma ALT were not significant statistically. Although a slight decrease in plasma Ca level and a slight increase in plasma P level was found with exercise, a statistical difference could not found according to the pre-exercise period. Key Words: AST, ALT, GGT, ALP, Ca, P, horse, exercise YARIŞ ATI OLARAK YETIŞTIRILEN ATLARDA FIZIKSEL EGZERSIZIN BAZI PLAZMA ENZIMLERI ILE CA VE P DUZEYLERINE ETKILERI Ozet Arastirmada materyal olarak 9 adet 2 yasli erkek Ingiliz ati kullanildi. Atlar cevresi 150 m olan kuru kum zemine sahip kapali manejde 10 dakikada 5400 metreyi tiris olarak kosturuldu. Egzersiz oncesi (0 dak). egzersizin 5 dakikasi ve egzersiz bitimi (10 dak.) ile egzersiz sonrasi 1/2 , 6, 12 ve 24. saatlerde alinan kan orneklerinde plazma Aspartat-aminotransferaz (AST), Alanin-aminotransferaz (ALT), Gama-glutamiltransfcraz (GGT). Alkalin-fosfataz (ALP), Kalsiyum (Ca), Fosfor (P) degisimleri ince­lendi. Plazma AST. ALP ve GGT duzeylerinde egzersiz bitiminde egzersiz oncesine gore hafif bir artis ol­masina ragmen farkliliklar istatistiksel olarak onemli degildi. Keza plazma ALT duzeyindeki degisikler de is­tatistiksel onemde bulunmadi. Egzersizle birlikte Ca duzeyinde bir azalma, P duzeyinde ise bir artis saptanmasina karsin egzersiz on­cesi doneme oranla meydana gelen bu degisimler istatistiksel olarak onemli bulunmadi. Anahtar Kelimeler: AST, ALT, GGT, ALP, Ca, P, at, egzersiz.