This is a 4 year study compilation of the analyses developed with the Spanish Junior National Team during their summer training camps before their participation in the European Junior Championships. The purpose of this study is to determine the frequency of errors observed in the start phases to the entry. 177 junior and pre-junior male and female elite swimmers performed the pike start. The most frequent problem found in the pike start is the incorrect head position at the moment of the entry in the water. 66% of the swimmers keep their heads up and 55% flexed knees. The push is not supported by the lack of force application of the hands on the pool block (45%) considering this a more evident problem in women. The frequencies of the mistakes found in the pre-junior swimmers were reduced in the junior group indicating an enhancement in the observed start technique after this period of development.
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