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Tytuł pozycji:

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.

Tytuł:
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.
Autorzy:
Kramer A; Sensorimotor Performance Lab, University of Konstanz, Konstanz, Germany.
Kümmel J; Sensorimotor Performance Lab, University of Konstanz, Konstanz, Germany.
Mulder E; Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.
Gollhofer A; Department of Sports and Sports Science, University of Freiburg, Freiburg, Germany.
Frings-Meuthen P; Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.
Gruber M; Sensorimotor Performance Lab, University of Konstanz, Konstanz, Germany.
Źródło:
PloS one [PLoS One] 2017 Jan 12; Vol. 12 (1), pp. e0169793. Date of Electronic Publication: 2017 Jan 12 (Print Publication: 2017).
Typ publikacji:
Journal Article; Randomized Controlled Trial
Język:
English
Imprint Name(s):
Original Publication: San Francisco, CA : Public Library of Science
MeSH Terms:
Bed Rest*
Body Mass Index*
Exercise/*physiology
Head-Down Tilt/*physiology
Leg/*physiology
Muscle Strength/*physiology
Adult ; Humans ; Male
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Entry Date(s):
Date Created: 20170113 Date Completed: 20170803 Latest Revision: 20181113
Update Code:
20220902
PubMed Central ID:
PMC5231329
DOI:
10.1371/journal.pone.0169793
PMID:
28081223
Czasopismo naukowe
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.
Competing Interests: The authors have declared that no competing interests exist.

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