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Wednesday, 11 July 2012

Prior high-intensity exercise improves 800-m running performance

Now updated abstract link is 
http://www.ncbi.nlm.nih.gov/pubmed/22868404


Abstract

Prior high-intensity exercise increases the oxidative energy contribution to subsequent exercise and may enhance exercise tolerance.  The potential impact of a high-intensity warm-up on competitive performance, however, has not been investigated.  PURPOSE: To test the hypothesis that a high-intensity warm-up would speed o2 kinetics and enhance 800-m running performance in well-trained athletes.  METHODS: Eleven highly-trained middle distance runners completed two 800-m time-trials on separate days on an indoor track preceded by two different warm-up procedures.  The 800-m time-trials were preceded by a 10-min self-paced jog and standardised mobility drills, followed by either 6 x 50-m ‘strides’ (control, CON) or 2 x 50-m strides and a continuous high-intensity 200-m run (HWU) at race-pace.  Blood [lactate] was measured before the time-trials and o2 was measured breath-by-breath throughout exercise.  RESULTS: 800-m time-trial performance was significantly faster following HWU (HWU, 124.5 ± 8.3 vs. CON, 125.7 ± 8.7 s, P<0.05).  Blood [lactate] was greater following HWU (HWU, 3.6 ± 1.9 vs. CON, 1.7 ± 0.8 mM; P<0.01).  The mean response time for the o2 response was not different between conditions (HWU, 27 ± 6 vs. CON, 28 ± 7 s) but total O2 consumed (HWU, 119 ± 18 vs. CON, 109 ± 28 ml.kg-1, P=0.05) and the peak o2 attained (HWU, 4.21 ± 0.85 vs. CON, 3.91 ± 0.63 L·min-1; P=0.08) tended to be greater following HWU.  CONCLUSIONS: These data indicate that a sustained high-intensity warm-up enhances 800-m time-trial performance in trained athletes.

Keywords: prior exercise; warm-up; priming; middle distance running

2 comments:

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  2. I think there is some work to do there to optimise because as you say the holding time is different, so with a short period such as 10 minutes you might not need as much.
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