In aim of confirming relations betwen swimming 50m crowl with arms only, swimming 50m crowl with legs only and 50m crowl swimming, a transversal research was carried out on 17 male swimmers aged 15-16. Criteria on this research was 50m crowl swimming – 50mK and predictor variables were: swimming 50m crowl with arms only – 50mRK, swimming 50m crowl with legs only – 50mNK. Regression analisys shows that swimming 50m crowl with legs only significantly correlate with 50m crowl swimming for this sample.