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Tytuł pozycji:

High Intensity Jump Exercise Preserves Posture Control, Gait, and Functional Mobility During 60 Days of Bed-Rest: An RCT Including 90 Days of Follow-Up.

Tytuł:
High Intensity Jump Exercise Preserves Posture Control, Gait, and Functional Mobility During 60 Days of Bed-Rest: An RCT Including 90 Days of Follow-Up.
Autorzy:
Ritzmann R; Institute of Sport and Sport Science, University of Freiburg, Freiburg, Germany.
Freyler K; Institute of Sport and Sport Science, University of Freiburg, Freiburg, Germany.
Kümmel J; Sensorimotor Performance Lab and Human Performance Research Centre, University of Konstanz, Konstanz, Germany.
Gruber M; Sensorimotor Performance Lab and Human Performance Research Centre, University of Konstanz, Konstanz, Germany.
Belavy DL; Centre of Muscle and Bone Research, Charité University Medicine Berlin, Berlin, Germany.; Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Geelong, VIC, Australia.
Felsenberg D; Centre of Muscle and Bone Research, Charité University Medicine Berlin, Berlin, Germany.
Gollhofer A; Institute of Sport and Sport Science, University of Freiburg, Freiburg, Germany.
Kramer A; Sensorimotor Performance Lab and Human Performance Research Centre, University of Konstanz, Konstanz, Germany.
Ambrecht G; Centre of Muscle and Bone Research, Charité University Medicine Berlin, Berlin, Germany.
Źródło:
Frontiers in physiology [Front Physiol] 2018 Dec 03; Vol. 9, pp. 1713. Date of Electronic Publication: 2018 Dec 03 (Print Publication: 2018).
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Original Publication: Lausanne : Frontiers Research Foundation
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Contributed Indexing:
Keywords: balance; chair rising; countermeasure; deconditioning; locomotion; neuromuscular; timed up and go
Entry Date(s):
Date Created: 20181219 Latest Revision: 20200929
Update Code:
20220902
PubMed Central ID:
PMC6287051
DOI:
10.3389/fphys.2018.01713
PMID:
30559676
Czasopismo naukowe
Physical inactivity causes a deconditioning of the human body. Concerns due to chronic bed-rest include deficits in posture and gait control, predisposing individuals to an increased fall and injury risk. This study assessed the efficiency of a high-load jump exercise (JUMP) as a countermeasure to prevent detrimental effects on gait, posture control and functional mobility. In an RCT (23 males), the effect of 60 days bed-rest without training was compared to JUMP. JUMP is characterized by plyometric executed as a high intensity interval training. Typical trainings session consisted of 4 × 10 countermovement jumps and 2 × 10 hops in a sledge jump system. We assessed sway path and muscle activity in monopedal stance, spatiotemporal, kinematic, and variability characteristics in gait, functional mobility with repeated chair-rises and Timed Up and Go (TUG). Results revealed: The JUMP group showed no significant changes after bed-rest, whereas the control group exhibited substantial deteriorations: an increased sway path (+104%, p < 0.05) was accompanied by increased co-contractions of antagonistic muscles encompassing the ankle (+32%, p < 0.05) and knee joint (45%, p < 0.05). A reduced locomotor speed (-22%, p < 0.05) was found concomitant with pathological gait rhythmicity ( p < 0.05), reduced joint excursions (ankle -8%, knee -29%, p < 0.05) and an increased gait variability ( p < 0.05). Chair-rising was slowed (+28%, p < 0.05) with reduced peak power (+18%, p < 0.05), and more time was needed to accomplish TUG (+39%, p < 0.05). The effects persisted for a period of 1 month after bed-rest. Increases in sway path were correlated to decreases in gait speed. The JUMP effectively preserved the neuromuscular system's ability to safely control postural equilibrium and perform complex locomotor movements, including fast bipedal gait with turns and rises. We therefore recommend JUMP as an appropriate strategy combatting functional deconditioning.

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