Intra-Personal and Inter-Personal Kinetic Synergies During Jumping
Identifieur interne : 000505 ( Pmc/Corpus ); précédent : 000504; suivant : 000506Intra-Personal and Inter-Personal Kinetic Synergies During Jumping
Auteurs : Kajetan Slomka ; Grzegorz Juras ; Grzegorz Sobota ; Mariusz Furmanek ; Marian Rzepko ; Mark L. LatashSource :
- Journal of Human Kinetics [ 1640-5544 ] ; 2015.
Abstract
We explored synergies between two legs and two subjects during preparation for a long jump into a target. Synergies were expected during one-person jumping. No such synergies were expected between two persons jumping in parallel without additional contact, while synergies were expected to emerge with haptic contact and become stronger with strong mechanical contact. Subjects performed jumps either alone (each foot standing on a separate force platform) or in dyads (parallel to each other, each person standing on a separate force platform) without any contact, with haptic contact, and with strong coupling. Strong negative correlations between pairs of force variables (strong synergies) were seen in the vertical force in one-person jumps and weaker synergies in two-person jumps with the strong contact. For other force variables, only weak synergies were present in one-person jumps and no negative correlations between pairs of force variable for two-person jumps. Pairs of moment variables from the two force platforms at steady state showed positive correlations, which were strong in one-person jumps and weaker, but still significant, in two-person jumps with the haptic and strong contact. Anticipatory synergy adjustments prior to action initiation were observed in one-person trials only. We interpret the different results for the force and moment variables at steady state as reflections of postural sway.
Url:
DOI: 10.1515/hukin-2015-0110
PubMed: 26839608
PubMed Central: 4723184
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