Introduction and Purpose: The swimming start is very important for achieving better results in

competitions. The Purpose of this study was to compare the effects of two plyometric training techniques

both in aquatic and on land in two start techniques (grab and track) of butterfly swimming in Elite male

adolescent Swimmers.Methodology: 20 elite male swimmers divided into two groups of plyometric

exercises in water and land-based. Swimming performance variables including; anaerobic power of hands

and legs, 25 meter swimming record, The time of contact of head with water and the time of keeping

movement in water, Flying distance from the starting point to the end point of contact with water and the

distance of continuing movement after entering the water using both start techniques, the number of

movements of hands and legs in 13 meters butterfly swimming without start and glide. Data analysis was

performed with MANOVA test. Results: Significant difference was seen in the mean time of contact of head

with water in both start techniques (grab and track) of Butterfly swimming; in addition, there is significant

difference in mean number of hand movement and leg movement in butterfly swimming and the number of

hand and leg movement in full 13 meter butterfly swimming after polymeric exercise in two

groups.Discussion and conclusion: According to the findings of this study, using plyometric training

program led to an increase and improvement in the measured parameters, and use these exercises to

improve start swimming recommended