Key result
The 800-m race pacing strategy produced a decrease in VO2 during the last 100 m (9.9 ± 6.3%) similar to the 400-m race (15.6 ± 6.5%), whereas the 1500-m race showed a non-systematic decrease.
Observational
The 800-m race exhibits similar decreases in velocity and VO2 at the end of the race as the 400-m race, correlated with reduced tidal volume and high blood lactate.
May guide 800-m pacing tactics akin to sprints; leaves open generalization beyond small cohorts.
The aim of this study was to compare the evolution of oxygen uptake (VO2) in specifically trained runners during running tests based on the 400-, 800-, and 1500-m pacing strategies adopted by elite runners to optimize performance. Final velocity decreased significantly for all three distances, with the slowest velocity in the last 100 m expressed relative to the peak velocity observed in the 400 m (77%), 800 m (88%), and 1500 m (96%). Relative to the previously determined VO2max values, the respective VO 2peak corresponded to 94% (400 m) and 100% (800 and 1500 m). In the last 100 m, a decrease in VO2 was observed in all participants for the 400-m (15.6 ± 6.5%) and 800-m races (9.9 ± 6.3%), whereas a non-systematic decrease (3.6 ± 7.6%) was noted for the 1500 m. The amplitude of this decrease was correlated with the reduction in tidal volume recorded during the last 100 m of each distance (r = 0.85, P < 0.0001) and with maximal blood lactate concentrations after the three races (r = 0.55, P < 0.005). The present data demonstrate that the 800 m is similar to the 400 m in terms of decreases in velocity and VO2.
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Hanon et al. (2011) conducted an observational in specifically trained runners. 400-, 800-, and 1500-m pacing strategies was evaluated on evolution of oxygen uptake (VO2). The 800-m race pacing strategy produced a decrease in VO2 during the last 100 m (9.9 ± 6.3%) similar to the 400-m race (15.6 ± 6.5%), whereas the 1500-m race showed a non-systematic decrease.
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