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Hypertrophy in the cervical muscles and thoracic discs in bed rest?

Belavý, Daniel L., Miokovic, Tanja, Armbrecht, Gabriele and Felsenberg, Dieter 2013, Hypertrophy in the cervical muscles and thoracic discs in bed rest?, Journal of applied physiology, vol. 115, no. 5, pp. 586-596, doi: 10.1152/japplphysiol.00376.2013.

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Title Hypertrophy in the cervical muscles and thoracic discs in bed rest?
Author(s) Belavý, Daniel L.ORCID iD for Belavý, Daniel L. orcid.org/0000-0002-9307-832X
Miokovic, Tanja
Armbrecht, Gabriele
Felsenberg, Dieter
Journal name Journal of applied physiology
Volume number 115
Issue number 5
Start page 586
End page 596
Total pages 11
Publisher American Physiological Society
Place of publication Bethesada, Md.
Publication date 2013-09
ISSN 1522-1601
Keyword(s) magnetic resonance imaging
microgravity
morphology
spaceflight
uncovertebral joint
Science & Technology
Life Sciences & Biomedicine
Physiology
Sport Sciences
space-flight
Summary The impact of prolonged bed rest on the cervical and upper thoracic spine is unknown. In the 2nd Berlin BedRest Study (BBR2-2), 24 male subjects underwent 60-day bed rest and performed either no exercise, resistive exercise, or resistive exercise with whole body vibration. Subjects were followed for 2 yr after bed rest. On axial cervical magnetic resonance images from the skull to T3, the volumes of the semispinalis capitis, splenius capitis, spinalis cervicis, longus capitis, longus colli, levator scapulae, sternocleidomastoid, middle and posterior scalenes, and anterior scalenes were measured. Disc height, anteroposterior width, and volume were measured from C2/3 to T6/7 on sagittal images. The volume of all muscles, with the exception of semispinalis capitis, increased during bed rest (P < 0.025). There were no significant differences between the groups for changes in the muscles. Increased upper and midthoracic spine disc height and volume (P < 0.001) was seen during bed rest, and disc height increases persisted at least 6 mo after bed rest. Increases in thoracic disc height were greater (P = 0.003) in the resistive vibration exercise group than in control. On radiological review, two subjects showed new injuries to the mid-lower thoracic spine. One of these subjects reported a midthoracic pain incident during maximal strength testing before bed rest and the other after countermeasure exercise on day 3 of bed rest. We conclude that bed rest is associated with increased disc size in the thoracic region and increases in muscle volume at the neck. The exercise device needs to be modified to ensure that load is distributed in a more physiological fashion.
Language eng
DOI 10.1152/japplphysiol.00376.2013
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 920299 Health and Support Services not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2013, American Physiological Society
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071035

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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