×

Serwis używa ciasteczek ("cookies") i podobnych technologii m.in. do utrzymania sesji i w celach statystycznych. • Ustawienia przeglądarki dotyczące obsługi ciasteczek można swobodnie zmieniać. • Całkowite zablokowanie zapisu ciasteczek na dysku komputera uniemożliwi logowanie się do serwisu. • Więcej informacji: Polityka cookies OPI PIB

×

Regulamin korzystania z serwisu PBN znajduję się pod adresem: Regulamin serwisu

Szukaj wśród:
Dane publikacji

Leg stiffness during phases of countermovement and take-off in vertical jump

Artykuł
Czasopismo : Acta of Bioengineering and Biomechanics   Tom: 15, Zeszyt: 2, Strony: 113-118
2013 angielski
Link do publicznie dostępnego pełnego tekstu
Identyfikatory
-
Cechy publikacji
-
  • Oryginalny artykuł naukowy
Dyscypliny naukowe
-
Nauki o kulturze fizycznej
Słowa kluczowe
-
Abstrakty ( angielski )
-
With respect to cyclic movements such as human gait, running or hopping, leg stiffness is a little variable parameter. The aim of this study was to investigate changes in leg stiffness during the ph ase of countermovement and take -off when performing a single max imum counter-movement jump. Kistler forc e plates and a BTS SMAR T system for comprehensive motion an alysis were employed in the study . The study covered a group of 12 athletes from university basket ball teams. Leg stiffness was cal culated in those parts of count er- movement and take-off phases where its level is relatively constant and the relationship F ( ∆ l ) is similar to linear one. Mean total stiffness (±SD) in both legs in the countermovement phase amount ed to 6.5 ± 1.5 kN/m, whereas during the take-off phase this va lue was 6.9 ± 1 kN/m. No sta tistically significant differences were found between leg stiffness during the countermovement phase an d take- off phase in the study group at the level of significance set at α = 0.05. This suggests that the leg stiffness in phase of countermovement and phase of take-off are much similar to e ach other, despite different function of both phases. Similar to cyclic movements, l eg stiffness turned out relatively constant when performing a single vertical jump. There are also reported statistically significant correl ations be- tween body mass, body height, length of lowe r limbs and leg stiffness. The stiffness analysed by the authors should be understo od as quasi-stiffness because the measurements of ∆ F ( ∆ l ) were made during transient states where inertia and dumping forces are likely to affect the final result.
Zacytuj dokument
-