CONSEQUENCES OF OPTIMAL PACING STRATEGIES FOR 400-, 800- AND 1500-M RACES ON VO2 RESPONSE

Abstract : This study aimed 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 used by the elite runners intending to realize their best performance. The final velocity decreases significantly in the three distances, the slowest velocity in the last 100 m expressed relatively to the peak velocity being observed on 400 m (77 %) compared to 800 m (88 %) and 1500 m (96 %). Relative to the previously determined max VO2max values, the respective VO2peak corresponded to 94 % (400 m) and 100% (800 and 1500 m). In the last 100 m, a decrease in VO2 was observed in all the participants for 400 (15.6 + 6.5 %) and 800-m races (9.9 + 6.3%), whereas a non-systematic decrease (3.6 + 7.6%) was noted on the 1500 m. The amplitude of this decrease is correlated to the tidal volume decrease also recorded during the last 100 m of each distance (r = 0.85, P<0.0001) and to the blood maximal [lactate] values measured post 400, 800 and 1500 m (r= 0.55, P<0.005). The present data demonstrate that 800 m is close to the 400 m relatively to decreases in velocity and VO2 .
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Christine Hanon, Claire Thomas. CONSEQUENCES OF OPTIMAL PACING STRATEGIES FOR 400-, 800- AND 1500-M RACES ON VO2 RESPONSE. Journal of Sports Sciences, Taylor & Francis: SSH Journals, 2011, 29 (9), pp.905-912. ⟨10.1080/02640414.2011.562232⟩. ⟨hal-01744416⟩

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