Abstract：
:The aim of this study was to investigate the role of trunk incline (TI) and projected frontal area (A(eff)) in determining drag during active/passive measurements. Active drag (D(a)) was measured in competitive swimmers at speeds from 0.6 to 1.4 m s(-1); speed specific drag (D(a)/v(2)) was found to decrease as a function of v (P < 0.001) to indicate that the human body becomes more streamlined with increasing speed. Indeed, both A(eff) and TI were found to decrease with v (P < 0.001) whereas C(d) (the drag coefficient) was found to be unaffected by v. These data suggest that speed specific drag depend essentially on A(eff). Additional data indicate that A(eff) is larger during front crawl swimming than during passive towing (0.4 vs. 0.24 m(2)). This suggest that D(a)/v(2) is larger than D(p)/v(2) and, at a given speed, that D(a) is larger than D(p).
journal_name
Eur J Appl Physioljournal_title
European journal of applied physiologyauthors
Zamparo P,Gatta G,Pendergast D,Capelli Cdoi
10.1007/s00421-009-1007-8subject
Has Abstractpub_date
2009-05-01 00:00:00pages
195-205issue
2eissn
1439-6319issn
1439-6327journal_volume
106pub_type
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