Abstract

DAMASCENO, Mayara Vieira et al. Relationship between oxygen uptake kinetics and the running strategy on a 10 km race. Rev Bras Med Esporte [online]. 2011, vol.17, n.5, pp. 354-357. ISSN 1517-8692.  http://dx.doi.org/10.1590/S1517-86922011000500012.

This study examined the influence of the O₂ kinetics on the running strategy adopted during a 10km running race in runners with different performance levels. Twenty-one runners (28.5 ± 5.3 years; 17.6 ± 7.3 cm; 66.3 ± 9.3 kg) performed 1) a test with increments of 1.2 km.h^-1 every 3 min until exhaustion; 2) one 6-min test of constant velocity at 9 km.h^-1 for determination of O₂ kinetics and; 3) a 10 km time trial simulation. The subjects were divided into two groups, Moderated Performance (MP) and Low Perfomance (LP), based on the 10-km running performance. Mean velocity (MP= 16.9 ± 0.8 vs BP= 14.9 ± 1 km.h^-1) on the 10km race was significantly different (p<0.05) between groups. There were no differences (p>0.05) between groups in any kinetics parameters analyzed. However, the O₂ increase amplitude (A1 parameter) was inversely correlated with mean velocity (r= -0.48, p < 0.05) and with the partial velocities on time trial (r between -0.44 and -0.48, p < 0.05), except for the last session (r=-0.19, p > 0.05). In conclusion, the correlation of A1 parameter with the partial velocities suggests an influence of running economy on the strategy adopted during the 10 km time trial.

Keywords : athletic performance; pulmonary gas exchange; physical exertion.