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