Document Detail

Relation between power and endurance for treadmill running of short duration.
MedLine Citation:
PMID:  2634558     Owner:  NLM     Status:  MEDLINE    
An exercise test was devised to investigate the relationship between power and endurance for treadmill running. The subjects were 19 males aged 21-25 yr (11 distance runners and 4 sprinters of provincial grade, and 4 non-competitive runners). Each subject ran to exhaustion on a treadmill at 15 km hr-1 at five different inclinations (31%-9%), giving maximum performance times in the range 10 s to 3 min. An iterative least-squares procedure was used to fit the following exponential model to each subject's data: It = I infinity + (I0-I infinity) exp (-t/tau), where It, I0 and I infinity are inclinations at time t = t, t = 0 and t----infinity, and tau is a time constant. The fit was excellent (r2 = 0.96-1.00). I0 and I infinity are interpreted as measures of maximum anaerobic (instantaneous) and maximum aerobic (continuous) power respectively. Inclinations corresponding to performance times of 10-180 s (I10-I180) were calculated from these parameters. Test-retest reliability was highest for I0-I30 (intraclass r = 0.97-0.94), lower for I60-I infinity (r = 0.89-0.84), and lowest for tau (r = 0.78). Good correlations were observed between I0-I30 and peak power in a 30 s all-out test on a cycle ergometer (r = 0.73-0.81), and between I180, I infinity and maximum oxygen consumption (r = 0.87, 0.81). The test may be useful for ranking or monitoring running performance for events of up to 1 min duration.
W G Hopkins; I M Edmond; B H Hamilton; D J Macfarlane; B H Ross
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ergonomics     Volume:  32     ISSN:  0014-0139     ISO Abbreviation:  Ergonomics     Publication Date:  1989 Dec 
Date Detail:
Created Date:  1990-06-05     Completed Date:  1990-06-05     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0373220     Medline TA:  Ergonomics     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  1565-71     Citation Subset:  IM; S    
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MeSH Terms
Exercise Test / methods*
Oxygen / physiology
Physical Endurance* / physiology
Reg. No./Substance:

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