Lombard's Paradox

Autor:

Delmar Thomas C. Stawart

Verfügbarkeit:

Auf Lager.

Artikelnummer:

1177816

29,90 €

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Produktbeschreibung

Lombard's Paradox

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lombard's Paradox describes a paradoxical muscular contraction in humans. When rising to stand from a sitting or squatting position, both the hamstrings and quadriceps contract at the same time, despite their being antagonists to each other. The rectus femoris biarticular muscle acting over the hip has a smaller hip moment arm than the hamstrings. However, the rectus femoris moment arm is greater over the knee than the hamstring knee moment. This means that contraction from both rectus femoris and hamstrings will result in hip and knee extension. Hip extension also adds a passive stretch component to rectus femoris, which results in a knee extension force. This paradox allows for efficient movement, especially during gait.
Zusatzinformation

Autor

Delmar Thomas C. Stawart

Bindung

Taschenbuch

Verlag

Alphascript Publishing

ISBN / EAN

9786138188414

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