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Cited by 364

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Changes in lower limb muscle cross‐sectional area and tissue fluid volume after transition from standing to supine

BERG, H. E., TEDNER, B., TESCH, P. A.·1993·Acta Physiologica Scandinavica
DOI 10.1111/j.1748-1716.1993.tb09573.x
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Abstract

Lower limbs show acute fluid shift in response to transition from upright to supine body position. It is hypothesized that this would affect tomographic estimations of muscle mass and composition. Seven healthy subjects were investigated during the initial 120 min of bed rest, using repeated computerized tomography (CT) and continuous bioelectrical impedance analysis (BIA). Thigh and calf muscle cross‐sectional area (CSA) decreased (P < 0.05) by 1.9 and 5.5% whereas fat CSA decreased (P < 0.05) by 4.1 and 4.4%, respectively. Radiological density (RD) of muscle showed a simultaneous increase (P < 0.05) by 4.8% in calf but not (P > 0.05) in thigh. No changes occurred (P > 0.05) in muscle or fat CSA or muscle RD in either thigh or calf between the first and second hour of bed rest. Fluid shift, as estimated by BIA, showed an exponential decay in thigh (τ th = 30 min) and calf (τ c2 = 37 min) by 2.5 and 8.7%, respectively, from first to 120 min of bed rest. Moreover, the calf showed an initial rapid (τ c1 = 8 s) 2.2% decrease. The demonstrated short‐term changes in leg CSA were more pronounced in the calf than in the thigh. They were similar in muscle and subcutaneous fat. These fluid shifts merit consideration when tomographic imaging techniques are used to estimate muscle mass and composition.

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Authors
BERG, H. E., TEDNER, B., & TESCH, P. A.
Venue
Acta Physiologica Scandinavica
Publisher
Wiley
Published
1993-08
Volume
148
Issue
4
Pages
379-385
ISSN
  • 0001-6772 (ISSN-L)
  • 1365-201X
DOI
10.1111/j.1748-1716.1993.tb09573.x
OpenAlex
W1992951953
Cited by
364
References
0
FWCI
1.25
Type
journal article
Language
en
Open access
closed

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