ABSTRACT
<p><b>AIM</b>To investigate the influence of living high-training low for 4 weeks on serum CK, LDH and ALT of rowing athletes.</p><p><b>METHODS</b>20 rowing athletes were divided into two groups: the one (ten subjects) spent 8-10 h per night in a tabernacle which was simulated altitude of 2 500 m in normobaric hypoxia (HiLo group), the another (ten subjects) slept at near sea level (control group). During the periods of test, all athletes were trained at the same relative or at the same intensity of work in normoxia state. The serum CK, LDH and ALT were measured at before, during 2 weeks, 4 weeks and 2 weeks after "living high and training low".</p><p><b>RESULTS</b>Baseline serum values for CK, LDH and ALT were not different between two groups (P > 0.05). The levels of CK, LDH of HiLo group were significantly increased (P < 0.05) than those of control group at 3 rd week, however, it was contrary at 5th and 7th week. After exercise of 2 km and 5 km, the values of LDH and CK at a moment notice and 30min postexercise test in HiLo group were significant lower than those in control group.</p><p><b>CONCLUSION</b>These results indicate that living high-training low may reduce the muscle damage associated with endurance exercise.</p>