Abstract

To study the effects of running in water on VO2 max endurance performance (EP), and lower extremity muscular strength and endurance, two groups of fit runners trained in a swimming pool or on land for 3 weeks. Before beginning the treatment conditions, VO2 max was determined using a progressive treadmill test with expired gas analysis. EP was recorded as time to fatigue at a treadmill velocity corresponding to 90 VO2 max. Quadriceps and hamstring strenght and endurance were assessed on a Cybex isokinetic dynamometer: The subjects then duplicated their normal running program of 30 min five times per week either on land (L) or in 8 feet of water (W) with simulated running activity. Posttesting showed no significant change in VO2 max. Quadriceps endurance showed no significant improvement. Quadriceps and hamstring strength were also not significantly changed. These data suggest that indices of cardiorespiratory fitness and lower extremity muscular strength and endurance are not adversely affected by 3 weeks of running in water and that this activity is suitable to maintain fitness for short periods of time when weight bearing is not possible. Verf.-Referat