Linked Life Data

6511147

Source:http://linkedlifedata.com/resource/pubmed/id/6511147

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1985-2-14
pubmed:abstractText
From 24 vertical jumps (eight subjects, three jumps each), calculations of forces, torques, and power per joint were combined with EMG data of eight leg muscles and with estimations of their contraction velocities. In the second part of the push-off, a high power output of 3000-4000 W was delivered in the ankle joints during plantar flexion. This is attributed to a sequential energy flow from hip to knee and ankle joints. Through coordinated actions of both the m. gluteus maximus and the m. rectus femoris as well as the m. vastus med., intermedius and lat. (mm. vasti) and the m. gastrocnemius, power delivered by the monoarticular extensors of the hip and knee joints was transported distally via the biarticular muscles to the ankle joints. During the high plantar flexion velocity at the end of the push-off, hip and knee joints showed high extension velocities resulting in relatively low contraction velocities for the biarticular muscles. As a consequence they could deliver high forces, which allowed them to transport energy in a proximodistal direction and allowed them to decelerate the angular velocities of the hip and knee joints without losses due to eccentric contractions. It is concluded that this power transport is essential in the execution of explosive movements.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0172-4622
pubmed:author
pubmed:issnType
Print
pubmed:volume
5
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
301-5
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Role of mono- and biarticular muscles in explosive movements.
pubmed:publicationType
Journal Article