Revista Brasileira de Medicina do Esporte
On-line version ISSN 1806-9940
COLANTONIO, Emilson and KISS, Maria Augusta Peduti Dal Molin. Velocities analysis: 4 mM reference, 30 min steady-state and critical velocity in female adolescent swimmers. Rev Bras Med Esporte [online]. 2007, vol.13, n.6, pp. 387-392. ISSN 1806-9940. http://dx.doi.org/10.1590/S1517-86922007000600006.
OBJECTIVE: To compare the results of the calculation of the anaerobic threshold velocity (AT), corresponding to 4 mM lactate, obtained in 2 x 400 m (V4-2), 4 x 400 m (V4-4) tests and critical velocity (CV) relating to the mean velocity determined in the 30 min test (VMT30) in female adolescent swimmers. METHODS: Twenty female swimmers (14.36 ± 1.22 years old; 52.75 ± 5.32 kg ; 159.97 ± 11.26 cm; % body fat 22.5 ± 4.73),with city and state level with at least two years of sistematic training participated in this study. Performed tests: 30 min test (MVT30), two-distance test (V4-2), four-distance test (V4-4) and critical velocity (CV). Statistical analysis: the procedure adopted to compare all methodologies, two by two, was the single regression analysis technique. RESULTS: The mean velocities were: T30: 1.12 ± 0.06 m/s; V4-2: 1.14 ± 0.12 m/s; V4-4: 1.12 ± 0.06 m/s and CV mean = 1.14 ± 0.07 m/s. Single regression analysis between metodologies, two by two: V4-4 and V4-2 (r = 0.324); CVand V4-2 (r = 0,058); MVT30 and V4-2 (r = 0.595); CV and V4-4 (r = 0.807); MVT30 and V4-4 (r = 0,796) and MVT30 and CV (r = 0,77). The adjusted regression lines presented in relation to the bisectrix the values of p = 0.3060; 0.1716 and 0.0058. CONCLUSIONS: The VMT30 determination is a good instrument for training prescription for the female adolescent swimmers studied, unlike the V4-2 model. The 4mM [La] with four points and lactate threshold calculation using random effects technique was useful for the AT determination in female adolescent swimmers, when compared to the MVT30; the CV and V4-4 presented a good correlation as well as the CV and MVT30.
Keywords : Swimming; Anerobic threshold; Lactate.