The purpose of this study was to compare the effect of land- and aquatic- based plyometric training on block start of lifesavers. For this reason 21 lifesavers were selected voluntary and divided to two experimental groups (Land plyometric training (n=7) Aquatic plyometric training (n=7)) and control group (n=7) randomly. Experimental groups trained four main skills of plyometric training including depth, star, rocket and squat jumps for 6 weeks and 3 times per week and 45 to 60 min in per session and control group had their routine training. For determination the effect of plyometric training were measured block time (BT), start time (ST),diving Length (DL) and 33-meter record of head-up crawl swimming (33m RHC). Before practices implementation, for each one of the dependent variables, a protest was taken from the participants and after practice period the whole subjects were tested with post tests. The analyzing of the date by ANOVA and T-test showed: there was no significant difference between 2 models of plyometric training (Aquatic and Land) on block start. But aquatic plyometric provided the same performance enhancement benefits as land plyometric with less muscle soreness.

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