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Tolerability of plyometric exercises on a short-arm centrifuge

Frett, Timo and Green, David Andrew and Jordan, Jens and Noppe, Alexandra and Arz, Michael and Petrat, Guido and Tegtbur, Uwe (2019) Tolerability of plyometric exercises on a short-arm centrifuge. 26th European Low Gravity Research Association Biennial Symposium and General Assembly (ELGRA), 24. - 27. September 2019, Granada, Spain.

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Official URL: https://www.elgra2019.com/programme

Abstract

Artificial Gravity generated by Short Arm Human Centrifuges is a promising multi-system countermeasure for physiological deconditioning during long duration space flights. However, motion sickness symptoms could limit the tolerability of the approach due to cross-coupled forces. Therefore, we determined the feasibility and tolerability, particularly occurrence of motion sickness symptoms, during reactive jumping exercises on a short-arm centrifuge. In a cross-over randomized study, we assessed motion sickness symptoms during reactive jumping exercises on a short-arm centrifuge in 15 healthy men at different +Gz-level (0.5, 0.75, 1.0, 1.25 and 1.5 +Gz referenced to Center of Mass). On the centrifuge, a jumping sledge was attached with low friction bearings that allowed horizontal movements and around pitch axis along the radius. Head movements were not restricted. Vertical jumping in Earth´s Gravity was used as control. The results showed good tolerability of the jumping exercises. Motion sickness ratings (using Motion Sickness Assessment Questionnaire pre/post conditions) were in general low in all conditions, post-hoc analysis only showed higher ratings (z = 2.527, p = 0.034) for condition +1Gz on the Short-arm centrifuge compared to control. Further related effects of motion sickness like mood changes or increased sleepiness recorded with PANAS and Epworth Sleepiness Scale were not significant higher after jumping exercises during centrifugation compared with control. Our study demonstrates that repetitive plyometric exercises are tolerable at different +Gz-levels during short radius centrifugation. The finding is remarkable given the significant head yaw, pitch, and roll velocities being generated in all conditions that are excess of those previously defined as being associated with comfort zones.

Item URL in elib:https://elib.dlr.de/133928/
Document Type:Conference or Workshop Item (Speech)
Title:Tolerability of plyometric exercises on a short-arm centrifuge
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Frett, TimoInstitute of Aerospace Medicine, Gravitational Biology, German Aerospace Center (DLR), Cologne, Germanyhttps://orcid.org/0000-0002-5572-1177
Green, David AndrewKing’s College London, London, UKUNSPECIFIED
Jordan, JensInstitute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germanyhttps://orcid.org/0000-0003-4518-0706
Noppe, AlexandraInstitute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, GermanyUNSPECIFIED
Arz, MichaelInstitute of Aerospace Medicine, German Aerospace Center (DLR), Linder Hoehe, Cologne, GermanyUNSPECIFIED
Petrat, GuidoInstitute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, GermanyUNSPECIFIED
Tegtbur, UweInstitute of Sports Medicine, Hannover Medical School, 30625 Hannover, GermanyUNSPECIFIED
Date:24 September 2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Plyometric exercises, Short-arm centrifuge, Artificial gravity, Motion sickness
Event Title:26th European Low Gravity Research Association Biennial Symposium and General Assembly (ELGRA)
Event Location:Granada, Spain
Event Type:international Conference
Event Dates:24. - 27. September 2019
Organizer:ELGRA and ESA
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Artificial Gravity
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Gravitational Biology
Institute of Aerospace Medicine > Office of Management and Budget
Institute of Aerospace Medicine > Leitungsbereich ME
Deposited By: Duwe, Helmut
Deposited On:30 Jan 2020 14:45
Last Modified:30 Jan 2020 14:45

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