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Adaptability of a jump movement pattern to a non-constant force field elicited via centrifugation

Kramer, Andreas and Kümmel, Jakob and Dreiner, Maren and Willwacher, Steffen and Frett, Timo and Niehoff, Anja and Gruber, Markus (2020) Adaptability of a jump movement pattern to a non-constant force field elicited via centrifugation. PLoS One, 15 (4). Public Library of Science (PLoS). doi: 10.1371/journal.pone.0230854. ISSN 1932-6203.

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Humans are accustomed to Earth's constant gravitational acceleration of 1g. Here we assessed if complex movements such as jumps can be adapted to different acceleration levels in a non-constant force field elicited through centrifugation. Kinematics, kinetics and muscle activity of 14 male subjects (age 27±5years, body mass 77±6kg, height 181±7cm) were recorded during repetitive hopping in a short-arm human centrifuge for five different acceleration levels (0.5g, 0.75g, 1g, 1.25g, 1.5g). These data were compared to those recorded during normal hops on the ground, and hops in a previously validated sledge jump system. Increasing acceleration from 0.5g to 1.5g resulted in increased peak ground reaction forces (+80%, p<0.001), rate of force development (+100%, p<0.001) and muscle activity (+30 to +140%, depending on phase, side and muscle). However, most of the recorded parameters did not attain the level observed for jumps on the ground or in the jump system. For instance, peak forces during centrifugation with 1g amounted to 60% of the peak forces during jumps on the ground, ground contact time was prolonged by 90%, and knee joint excursions were reduced by 50%. We conclude that in principle, a quick adaptation to acceleration levels other than the normal constant gravitational acceleration of 1g is possible, even in the presence of a non-constant force field and Coriolis forces. However, centrifugation introduced additional constraints compared to a constant force field without rotation, resulting in lower peak forces and changes in kinematics. These changes can be interpreted as a movement strategy aimed at reducing lower limb deflections caused by Coriolis forces.

Item URL in elib:https://elib.dlr.de/185769/
Document Type:Article
Title:Adaptability of a jump movement pattern to a non-constant force field elicited via centrifugation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Kramer, AndreasNeuromechanics Research Group, Sport Sciences, University of Konstanz, Konstanz, GermanyUNSPECIFIEDUNSPECIFIED
Kümmel, JakobUniversity of KonstanzUNSPECIFIEDUNSPECIFIED
Frett, TimoUNSPECIFIEDhttps://orcid.org/0000-0002-5572-1177UNSPECIFIED
Niehoff, AnjaGerman Sport University CologneUNSPECIFIEDUNSPECIFIED
Gruber, MarkusDepartment of Sport Science, University of Konstanz, Konstanz, Germanyhttps://orcid.org/0000-0002-0233-3912UNSPECIFIED
Date:8 April 2020
Journal or Publication Title:PLoS One
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Public Library of Science (PLoS)
Keywords:jump movement; centrifugation;
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Human performance under altered gravity conditions
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Gravitational Biology
Deposited By: Becker, Christine
Deposited On:11 Apr 2022 10:19
Last Modified:24 May 2022 17:00

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