ANALYSIS OF STROKE, COORDINATIVE AND TEMPORAL PARAMETERS IN TRANSITION FROM UNDERWATER TO SURFACE SWIMMING

The objective of this study was to characterize the stroking, coordinative and temporal parameters of international swimmers during transition from underwater to surface swimming. 12 international junior swimmers were filmed on the four strokes and they wre video analysed using DLT-20 algorithms to calculate the swimming velocity, stroking rate and stroking length at emersion as well as the index of coordination (IdC) and the % of each stroke phase duration on the complete cycle. The descriptive analysis of these data showed higher swimming velocity, stroking rate and IdC but shorter stroking length than previous studies characterizing free swimming. Also, the relative duration of the non-propulsive stroke phases was shorter when emerging from underwater. Therefore, the stroke, coordinative and temporal parameters should also be monitored during the transition phase of the swimming start and turns.

[1]  L Seifert,et al.  A new index of flat breaststroke propulsion: A comparison of elite men and women , 2005, Journal of sports sciences.

[2]  Didier Chollet,et al.  Arm coordination in elite backstroke swimmers , 2008, Journal of sports sciences.

[3]  L Seifert,et al.  Effect of swimming velocity on arm coordination in the front crawl: a dynamic analysis , 2004, Journal of sports sciences.

[4]  L Seifert,et al.  Hip velocity and arm coordination in front crawl swimming. , 2010, International journal of sports medicine.

[5]  M. Gómez-Ruano,et al.  Do faster swimmers spend longer underwater than slower swimmers at World Championships? , 2016, European journal of sport science.

[6]  D Chollet,et al.  Evaluation of arm-leg coordination in flat breaststroke. , 2004, International journal of sports medicine.

[7]  D. Chollet,et al.  Swimming constraints and arm coordination. , 2007, Human movement science.

[8]  D. Chollet,et al.  Arm to leg coordination in elite butterfly swimmers. , 2006, International journal of sports medicine.

[9]  L Seifert,et al.  Effect of expertise on butterfly stroke coordination , 2007, Journal of sports sciences.

[10]  Abel Rouboa,et al.  Determination of the drag coefficient during the first and second gliding positions of the breaststroke underwater stroke. , 2010, Journal of applied biomechanics.