Abstract：
OBJECTIVES:Swimmers must enter a marshalling call-room 20min prior to racing, which results in some swimmers completing their warm-up 45min pre-race. Since a recovery period longer than 15-20min may prove problematic, this study examined 200m freestyle performance after a 20 and 45min post-warm-up recovery period. DESIGN:Eight international swimmers completed this randomised and counter-balanced study. METHODS:After a standardised warm-up, swimmers rested for either 20 (20min) or 45min (45min) prior to completing a 200m freestyle time-trial (TT). Core temperature (T(core)), blood lactate (BL), heart rate and rate of perceived exertion (RPE) were recorded at baseline, post-warm-up, pre-TT, immediately post-TT and at 3min post-TT. RESULTS:T(core) was similar after the warm-up under both conditions, however, at pre-TT T(core) was greater under 20min (mean±SD; 20min 37.8±0.2 vs. 45min 37.5±0.2°C; P=0.002). BL was similar between conditions at all-time points before the TT (P>0.05). Swimmers demonstrated a 1.5±1.1% improvement in performance under 20min (20min 125.74±3.64 vs. 45min 127.60±3.55s; P=0.01). T(core) was similar between conditions at immediately post-TT and 3min post-TT (P>0.05), however, BL was higher at these time points under 20min (P<0.05). Heart rate and RPE were similar between conditions at all-time points (P>0.05). CONCLUSIONS:200m freestyle performance is faster 20min post-warm-up when compared to 45min probably due to better T(core) maintenance. This has implications for swim race preparation as warm-up procedures should be completed close to entering the pre-race call room, in order to maintain elevated core temperature.
journal_name
J Sci Med Sportjournal_title
Journal of science and medicine in sportauthors
West DJ,Dietzig BM,Bracken RM,Cunningham DJ,Crewther BT,Cook CJ,Kilduff LPdoi
10.1016/j.jsams.2012.06.002subject
Has Abstractpub_date
2013-03-01 00:00:00pages
172-6issue
2eissn
1440-2440issn
1878-1861pii
S1440-2440(12)00120-Xjournal_volume
16pub_type
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