Proposal and verification of the validity of anaerobic threshold tests for swimming in crawl swin / Proposta e verificação da validade de testes de limiar anaerobico para natação do nado crawl

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

It is essential to set up coherent measurement tests for training control in high performance sports. This study aims to propose and evaluate tests of Anaerobic Threshold (AT) for crawl swimming style. This study involves 14 competitive swimmers at state level: a group of 7 men (Men) and another group of 7 women (Women). Each athlete has performed 5 tests of AT, with two days of recovery among the tests, 4 of which are proposed and consolidated in the literature: tests of 30, 12, 10 minutes (T30’, T12’and T10’, respectively) and one test of Minimum Lactate adapted from Tegtbur et al. (1993). The last test, proposed by the researcher, consists of 8- minute (T8`) swimming at maximal and constant speed. All tests measured athletes’ blood lactate concentration ([LAC]), heart rating (HR), speed (Vel), and test rhythm variation. The blood samples for the verification of blood lactate concentration were collected before and after the test, in order to verify the kinetic of the blood lactate referring to each test. Based on the analysis of the speed and rhythm, it was possible to verify that, in all the time tests, there was no variation of rhythm during the distance athletes swam. Moreover, the speed in T30’ (1,27 m/s ± 0,046 in the group of men (GH) e 1,10 m/s ± 0,07 for women’s group (GM)) does not register significant difference for either group when compared to the speed in the Minimum Lactate test (1,29 m/s ± 0,035 for GH e 1,14 m/s ± 0,048 for GM). In the group of men, the T8’ (1,37 m/s ± 0,030), T10’ (1.35 m/s ± 0,043) and T12’ (1,34 m/s ± 0,031) tests do not show differences regarding speed, but overestimate the speed in T30’ and Minimum Lactate tests. The same is valid for the women’s group for T8’ (1,18 m/s ± 0,050) and T12’ (1,16 m/s ± 0,059), in which the only difference is that the T10’ showed equivalent readings when compared to the T30’ and the Minimum Lactate test. About [LAC] the GH do not show differences between T8’ (12.62 ± 1.02) and T12’ (12.51 ± 2.37) neither T30’ (8.02 ± 1.95) and LACmín (7.84 ± 1.80) and the T10’was the test of higher [LAC] (15.66 ± 2.18). For GM [LAC] show differences between T8’ (11.68 ± 1.47) and T30’ (6.43 ± 2.29), T10’ (11.82 ± 1.96) and T30’ and T12’(12.06 ± 2.50) and T30’, but there was no difference among T30’ and LACmín (8.43 ± 3.22). The HR did not relate to any tests and can be compared to neither the blood lactate concentration [LAC], with very individualized readings, nor to each test speed. Therefore, the HR should not be seen as a herald of athlete’s performance. It is possible to conclude that fixing values for HR and blood lactate concentration [LAC] may distort a swimmer’s performance capacity by either underestimating or overestimating it. So, incremental tests or longer tests, such as T30’, seem to be more reliable for determining AT on an individual basis.

ASSUNTO(S)

lactatos anaerobic threshold lactates limiar anaerobio testing testes

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