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High-Intensity Jump Training Is Tolerated during 60 Days of Bed Rest and Is Very Effective in Preserving Leg Power and Lean Body Mass: An Overview of the Cologne RSL Study

Kramer, A and Kümmel, J and Mulder, E. and Gollhofer, A. and Frings-Meuthen, P. and Gruber, M (2017) High-Intensity Jump Training Is Tolerated during 60 Days of Bed Rest and Is Very Effective in Preserving Leg Power and Lean Body Mass: An Overview of the Cologne RSL Study. PLoS One, 12 (1), pp. 1-18. Public Library of Science (PLoS). DOI: 10.1371/journal.pone.0169793 ISSN 1932-6203

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Abstract

Purpose Space agencies are looking for effective and efficient countermeasures for the degrading effects of weightlessness on the human body. The aim of this study was to assess the effects of a novel jump exercise countermeasure during bed rest on vitals, body mass, body composition, and jump performance. Methods 23 male participants (29±6 years, 181±6 cm, 77±7 kg) were confined to a bed rest facility for 90 days: a 15-day ambulatory measurement phase, a 60-day six-degree head-down-tilt bed rest phase (HDT), and a 15-day ambulatory recovery phase. Participants were randomly allocated to the jump training group (JUMP, n = 12) or the control group (CTRL, n = 11). A typical training session consisted of 4x10 countermovement jumps and 2x10 hops in a sledge jump system. The training group had to complete 5–6 sessions per week. Results Peak force for the reactive hops (3.6±0.4 kN) as well as jump height (35±4 cm) and peak power (3.1±0.2 kW) for the countermovement jumps could be maintained over the 60 days of HDT. Lean body mass decreased in CTRL but not in JUMP (-1.6±1.9 kg and 0±1.0 kg, respectively, interaction effect p = 0.03). Resting heart rate during recovery was significantly increased for CTRL but not for JUMP (interaction effect p<0.001). Conclusion Participants tolerated the near-daily high-intensity jump training and maintained high peak forces and high power output during 60 days of bed rest. The countermeasure was effective in preserving lean body mass and partly preventing cardiac deconditioning with only several minutes of training per day.

Item URL in elib:https://elib.dlr.de/113821/
Document Type:Article
Title:High-Intensity Jump Training Is Tolerated during 60 Days of Bed Rest and Is Very Effective in Preserving Leg Power and Lean Body Mass: An Overview of the Cologne RSL Study
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kramer, AUniversity of KonstanzUNSPECIFIED
Kümmel, JUniversity of KonstanzUNSPECIFIED
Mulder, E.german aerospace center (dlr), institute of aerospace medicine, biomedical science support center, cologne, germanyUNSPECIFIED
Gollhofer, A.department of sport science, university of freiburg, germanyUNSPECIFIED
Frings-Meuthen, P.german aerospace center (dlr), institute of aerospace medicine, space physiology, cologne, germanyUNSPECIFIED
Gruber, MUniversity of KonstanzUNSPECIFIED
Date:12 January 2017
Journal or Publication Title:PLoS One
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12
DOI :10.1371/journal.pone.0169793
Page Range:pp. 1-18
Editors:
EditorsEmail
Padulo, JohnnyUniversity e-Campus,
Publisher:Public Library of Science (PLoS)
ISSN:1932-6203
Status:Published
Keywords:Jump Training; Bed Rest; High-Intensity; countermeasure; jump exercise; jump performance
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 Effects of Mikro-g und Hyper-g
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Muscle and Bone Metabolism
Deposited By: Becker, Christine
Deposited On:30 Aug 2017 15:51
Last Modified:08 Mar 2018 18:49

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