The effect of different first 200-m pacing strategies on blood lactate and biomechanical parameters of the 400-m sprint
The purpose of the present study was to evaluate the effect of three pacing strategies upon performance of the 400-m sprint. Eight healthy male physical education students participated in this study. Each participant performed a 200-m maximal test (200 MAX ) and three 400-m running tests in a random...
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Veröffentlicht in: | European journal of applied physiology 2011-08, Vol.111 (8), p.1579-1590 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The purpose of the present study was to evaluate the effect of three pacing strategies upon performance of the 400-m sprint. Eight healthy male physical education students participated in this study. Each participant performed a 200-m maximal test (200
MAX
) and three 400-m running tests in a random counterbalanced design. The 400-m tests were run with the first 200-m pace set at 98% (400
98%
), 95% (400
95%
), and 93% (400
93%
), respectively, of the effort for 200
MAX
. The stimulation of the lactate system was assessed by post-test blood lactate concentration (BLa). Running speed (RS) was controlled with time-keeping devices. Stride frequency (SF), stride length (SL) and lower extremity kinematics were acquired with video cameras operating at 100 fps at the 125 and 380-m marks of the tests. A two-way analysis of variance (ANOVA) with repeated measures was used to identify modifications caused by the pacing strategies used. Non-significant differences were revealed for BLa. The fastest 400-m race was run in 400
93%
, but performance was not significantly different (
p
> 0.05) among the examined pacing strategies. RS, SF and SL had significantly (
p
|
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ISSN: | 1439-6319 1439-6327 |
DOI: | 10.1007/s00421-010-1772-4 |