TY  - JOUR
AU  - Kjendlie, Per-Ludvik
A2  - Kjendlie, Per-Ludvik
A2  - Stallman, Robert Keig
DB  - BISp
DP  - BISp
KW  - Bewegungsgeschwindigkeit
KW  - Bewegungslehre
KW  - Biomechanik
KW  - Erwachsener
KW  - Kind
KW  - Kraulschwimmen
KW  - Leistungssport
KW  - Schwimmen
KW  - Strömung
KW  - Technik, sportliche
KW  - Wettkampf
KW  - Widerstand
LA  - eng
TI  - Drag characteristics of competitive swimming children and adults
TT  - Die Charaktersitik des Strömungswiderstands beim wettkampforientierten Schwimmen von Kindern und Erwachsenen
PY  - 2008
N2  - The aims of this study were to compare drag in swimming children and adults, quantify technique using the technique drag index (TDI), and use the Froude number (Fr) to study whether children or adults reach hull speed at maximal velocity (vmax). Active and passive drag was measured by the perturbation method and a velocity decay method, respectively, including 9 children aged 11.7 ± 0.8 and 13 adults aged 21.4 ± 3.7. The children had significantly lower active (kAD) and passive drag factor (kPD) compared with the adults. TDI (kAD/kPD) could not detect any differences in swimming technique between the two groups, owing to the adults swimming maximally at a higher Fr, increasing the wave drag component, and masking the effect of better technique. The children were found not to reach hull speed at vmax, and their Fr were 0.37 ± 0.01 vs. the adults 0.42 ± 0.01, indicating adults’ larger wave-making component of resistance at vmax compared with children. Fr is proposed as an evaluation tool for competitive swimmers. Verf.-Referat
L2  - https://dx.doi.org/10.1123/jab.24.1.35
DO  - 10.1123/jab.24.1.35
SP  - S. 35-42
SN  - 1065-8483
JO  - Journal of applied biomechanics
IS  - 1
VL  - 24
M3  - Gedruckte Ressource
M3  - Elektronische Ressource (Datenträger)
ID  - PU201001000172
ER  -