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Advisor(s)
Abstract(s)
The purpose of this study was to track and
compare the changes of performance, energetic and biomechanical
profiles of international (Int) and national (Nat)
level swimmers during a season. Ten Portuguese male
swimmers (four Int and six Nat level subjects) were evaluated
on three different time periods (TP1, TP2, TP3) of the
2009–2010 season. Swimming performance was assessed
based on official time’s lists of the 200-m freestyle event.
An incremental set of 7 9 200 m swims was applied to
assess the energetic and biomechanical data. Measurements
were made of: (1) velocity at the 4 mmol of lactate levels
(V4), stroke index at V4 (SI@V4) and propelling efficiency
at V4 (gp@V4), as energetic estimators; (2) stroke length at
V4 (SL@V4) and stroke frequency at V4 (SF@V4), as
biomechanical variables. The results demonstrated no significant
variations in all variables throughout the season.
The inter-group comparison pointed out higher values for
Int swimmers, with statistical differences for the 200 m
performance in all time periods. Near values of the statistical
significance were demonstrated for the SI@V4 in
TP1 and TP3. The tracking based on K values was high only
for the SI@V4. It is concluded that a high stability can be
observed for elite swimmers performance, energetic and
biomechanical profiles throughout a single season. Int
swimmers are able to maintain a higher energetic and
biomechanical capacity than Nat ones at all times. The
SI@V4 may be used as an indicator of performance
variation.
Description
Keywords
Performance Elite swimmers Biophysics Freestyle Tracking
Citation
Costa, M.J.; Bragada, José A.; Meijas, J.E.; Louro, H.; Marinho, D.A.; Silva, A.J.; Barbosa, Tiago M. (2012). Tracking the performance, energetics and biomechanics of international versus national level swimmers during a competitive season. European Journal of Applied Physiology. ISSN 1439-6319. 112:3, p. 811-820
Publisher
Springer