Document Detail

Effect of long haul travel on maximal sprint performance and diurnal variations in elite skeleton athletes.
MedLine Citation:
PMID:  17473002     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To quantify the impact of eastward long haul travel on diurnal variations in cortisol, psychological sensations and daily measurements of physical performance.
METHODS: Five elite Australian skeleton athletes undertook a long haul eastward flight from Australia to Canada (LH(travel)), while seven elite Canadian skeleton athletes did not travel (NO(travel)). Salivary cortisol was measured on awakening, 60 min and 120 min after awakening. Psychological sensations were measured with a questionnaire, and maximal 30 m sprints were performed once a day between 09:30 and 11:00 h local time.
RESULTS: Compared with baseline, average (SD) resting salivary cortisol decreased by 67% immediately after long haul travel (23.43 (5.71) nMol/l) (mean+/-90% confidence interval) in the LH(travel) group (p = 0.03), while no changes were found in the NO(travel) group (p = 0.74). There were no significant differences in 30 m sprint time between baseline and post-flight tests in the LH(travel) group (p>0.05). The LH(travel) group perceived themselves as "jet lagged" for up to 2 days after the flight (p = 0.01 for both midday lunch and evening dinner).
CONCLUSIONS: Despite a distinct phase change in salivary cortisol rhythmicity and the athletes perceiving themselves as "jet lagged", minimal disturbances in "one-off" maximal sprinting ability between 09:30 and 11:00 h local time were seen in a group of elite skeleton athletes after long haul eastward travel from Australia to Canada.
Nicola Bullock; David T Martin; Angus Ross; Doug Rosemond; Frank E Marino
Publication Detail:
Type:  Journal Article     Date:  2007-05-01
Journal Detail:
Title:  British journal of sports medicine     Volume:  41     ISSN:  1473-0480     ISO Abbreviation:  Br J Sports Med     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-08-29     Completed Date:  2007-09-28     Revised Date:  2013-06-06    
Medline Journal Info:
Nlm Unique ID:  0432520     Medline TA:  Br J Sports Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  569-73; discussion 573     Citation Subset:  IM    
Department of Physiology, Australian Institute of Sport, Belconnen, ACT, Australia.
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MeSH Terms
Circadian Rhythm / physiology*
Hydrocortisone / metabolism*
Jet Lag Syndrome / physiopathology*
Running / physiology*,  psychology
Saliva / chemistry
Sports / physiology*
Reg. No./Substance:

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