Introduction: Regular training is an important guideline in maintaining health of children and adolescents. Among different kinds of training to increase speed and energetic capabilities in such kinds of fields, plyometric training are suitable planning. Evidences indicate that explosive actions and ability to produce muscle energy at high speeds in dynamic movements can be improved. Regarding the fact that in speed swimming, most of the muscular spams are of inner kind and this proficiency needs high muscular and nerve harmony, plyometric training cause the inner interactive energy, muscle and neural harmony to increase, and the previous studies on the different sports regarding this training illustrates their positive effect.
Methodology: 21 swimmers ages (10-14) were chosen and then were randomly divided into three groups of training in water (7 swimmers), in land (7 individuals) and control (7 swimmers). The first and the second groups basically trained the chosen plyometric ones for six weeks of three sessions and six weeks after the training we did 50-meter chest crawl, dive length and anaerobic energy test. We used t-independent and dependent statistical methods and one sided variance analyses at the level of p>=0 .05 to analyze the results.
Results: In both of the groups of land- and aquatic based plyometric training the record of 50-meter crawl, diving length, and anaerobic energy improved significantly (p<0.05). Also there was no striking difference among the records of 50-meter crawl, diving length and anaerobic energy in land- and aquatic-based plyometric training (p>0.05).
Discussion: Regarding the identical improvement of all of the dependent variations in both of the training groups and lack of meaningful differences between two groups and also availability of water for swimmers, being neediness to special apparatus to training in water and decreasing joint hurt one can substitute plyometric training with land-based training. Findings of the present studies are like the findings of esteem.