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Capillary supply of the tibialis anterior muscle in young, healthy, and moderately active men and women.
Faculty of Physical Education and Recreation Studies, University of Manitoba, Winnipeg, Manitoba.
Faculty of Physical Education and Recreation Studies, University of Manitoba, Winnipeg, Manitoba.
Department of Rehabilitation, Lund University Hospital, Sweden.
2002 (English)In: Journal of applied physiology, ISSN 8750-7587, E-ISSN 1522-1601, Vol. 92, no 4, p. 1451-1457Article in journal (Refereed) Published
Abstract [en]

Tibialis anterior muscle biopsies from moderately active men and women (21-30 yr; n = 30) were examined to determine potential gender differences in capillarization. The fiber type proportions [type I (T1) approximately 73%] were unaffected by gender. The men (M) had significantly (P < 0.001) larger fibers than the women (W), with a greater gender effect for type II (T2) fibers (P < 0.001). The M and W had similar capillary densities (CD approximately 390 capillaries/mm2), but the capillaries-to-fiber ratio (C/F) was higher in the M (M = 2.20 +/- 0.35, W = 1.66 +/- 0.32; P < 0.01). Capillary contacts (CC) were higher in T2 than T1 for the M (P < 0.01), but not W, and M had greater CC (P < 0.001). Both fiber area per capillary (FA/C) and fiber perimeter per capillary (FP/C) indicated that T1 fibers had greater capillarization than T2 fibers (P < 0.001). There were no gender differences in T1 FA/C and T2 FA/C or T1 FP/C, but a gender difference existed for T2 FP/C (M = 60.5 +/- 10.9, W = 70.6 +/- 13.4; P < 0.01). The gender difference for C/F could be explained by fiber size; however, the physiological implications of the difference in T2 FP/C remains to be determined. In conclusion, despite gender differences for fiber size, overall, capillarization was similar between the men and women.

Place, publisher, year, edition, pages
2002. Vol. 92, no 4, p. 1451-1457
Identifiers
URN: urn:nbn:se:ltu:diva-4877Local ID: 2e194ee0-6528-11dc-8a3f-000ea68e967bOAI: oai:DiVA.org:ltu-4877DiVA, id: diva2:977751
Note
Upprättat; 2002; 20070917 (lotfra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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