V max estimate from three-parameter critical velocity models: validity and impact on 800 m running performance prediction

Abstract

The purpose of this study was to evaluate the validity of maximal velocity (Vmax) estimated from three-parameter systems models, and to compare the predictive value of two- and three-parameter models for the 800 m. Seventeen trained male subjects (VO2max=66.54+/-7.29 ml min(-1) kg(-1)) performed five randomly ordered constant velocity tests (CVT), a maximal velocity test (mean velocity over the last 10 m portion of a 40 m sprint) and a 800 m time trial (V 800 m). Five systems models (two three-parameter and three two-parameter) were used to compute V max (three-parameter models), critical velocity (CV), anaerobic running capacity (ARC) and V800m from times to exhaustion during CVT. Vmax estimates were significantly lower than (0.19<Bias<0.24 m s(-1)) and poorly associated (0.44<r<0.49) with actual Vmax (8.43+/-0.33 m s(-1)). Critical velocity (CV) alone explained 40-62% of the variance in V800m. Combining CV with other parameters of each model to produce a calculated V800m resulted in a clear improvement of this relationship (0.83<r<0.94). Three-parameter models had a better association (0.93<r<0.94) and a lower bias (0.00<Bias<0.04 m s(-1)) with actual V800 m (5.87+/-0.49 m s(-1)) than two-parameter models (0.83<r<0.91, 0.06<Bias<0.20). If three-parameter models appear to have a better predictive value for short duration events such as the 800 m, the fact the Vmax is not associated with the ability it is supposed to reflect suggests that they are more empirical than systems models.

The highest intensity and the shortest duration permitting attainment of maximal oxygen uptake during cycling: effects of different methods and aerobic fitness level

“…Recently, Bosquet et al (2006) have shown that critical velocity determined by twoparameter hyperbolic model overestimated the real performance for the exercise duration of *136 s. In the same way, in the present study the CP model overestimated both the estimated I HIGH (EI HIGH ) and predicted I HIGH only for EC, presumably because the effect of reduced exercise duration on the estimates from CP model (Table 2; Fig. 6).…”

“…Possible limitations of the CP model Some authors have indicated the limitation of the twoparameter CP model for estimating the intensity or T lim at high-intensity exercises (Hopkins et al 1989;Morton 1996;Bosquet et al 2006). Recently, Bosquet et al (2006) have shown that critical velocity determined by twoparameter hyperbolic model overestimated the real performance for the exercise duration of *136 s. In the same way, in the present study the CP model overestimated both the estimated I HIGH (EI HIGH ) and predicted I HIGH only for EC, presumably because the effect of reduced exercise duration on the estimates from CP model (Table 2; Fig.…”

“…Clearly, this requirement is not met in nature, and the twoparameter CP model may break down when T lim is too low (e.g., T lim = ET LOW , see the lower panel in Fig. 1) (Bosquet et al 2006;Hopkins et al 1989;Morton 1996). Bosquet et al (2006) have shown that critical velocity (extension of power-T lim to velocity-T lim model) determined by two-parameter hyperbolic model overestimated the real performance of exercise lasting *136 s. In this way, as EI HIGH is obtained from CP model by using ET LOW , it is likely that the two-parameter CP model shows a limitation to estimate EI HIGH when lower ET LOW values are utilized.…”

Bioenergetics Applied to Swimming: An Ecological Method to Monitor and Prescribe Training

“…Billat et al (2000) found that V max3par was not different from the maximum speed obtained in 20 m at maximal effort. However, Bosquet et al (2006) suggest that V max3par is smaller than the real V max (obtained by the average speed of the last 10 m of a maximal 40 m effort). Zacca et al (2010) found that V max was higher in sprint than endurance swimmers (2.53 ± 0.15 m·s -1 and 2.07 ± 0.19 m·s -1 respectively) independent of the mathematical model used (three or four parameters).…”

Utilização do modelo de potência crítica para avaliação da capacidade aeróbia e anaeróbia em protocolo específico para o tênis de mesa

“…Com o objetivo de aprimorar o modelo de PC, foram elaborados mais dois modelos matemáticos (BOSQUET et al, 2006;2008, MORTON 1996 VERGAUWEN et al 1998;SMEKAL et al, 2000), badminton WONISCH et al 2003) e squash .…”