Abstract
Background. The differences of urokinase-type plasminogen activator (u-PA) and tissue-type plasminogen activator (t-PA) between maximal treadmill and deep-water running have not been reported. The purpose of this investigation was to compare u-PA and t-PA levels during maximal treadmill and deep-water running. Methods. Six male subjects carried out two maximal exercises, one on a treadmill and the other running in deep water using a vest. The u-PA, t-PA, total plasminogen activator inhibitor (PAI-1), epinephrine, and norepinephrine in plasma and lactate and ammonia in blood concentrations were measured after maximal exercise. Results. The blood lactate and ammonia concentrations were significantly higher in treadmill running than in deep-water running during recovery following exercise ( P < 0.05). At 1 min after exercise, the plasma epinephrine, norepinephrine levels, and the u-PA and t-PA levels were higher in treadmill running compared with that in deep-water running ( P < 0.05). No significant difference between the two runs was found in PAI-1 level. Conclusion. The maximal treadmill running induced a greater increase in u-PA and t-PA levels than maximal deep-water running.
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