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First published online June 15, 2006
Journal of Experimental Biology 209, 2385-2394 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02287

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Partitioning locomotor energy use among and within muscles Muscle blood flow as a measure of muscle oxygen consumption

Richard L. Marsh^1,* and David J. Ellerby²

¹ Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA
² Department of Biological Sciences, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA

View larger version (15K): [in a new window]   Fig. 1. Relation between mean blood flow to the leg muscles and mean organismal oxygen consumption in guinea fowl. The line is a regression line through all the data (slope=9.1±1.2, 95%C.I.). Values are means ± 1 s.e.m. (N=5-8). Circles (Marsh et al., 2004); triangles Rubenson et al., 2006); squares (Ellerby and Marsh, 2006).

View larger version (15K): [in a new window]   Fig. 2. Relation between regional blood flow and oxygen consumption in the legs or arms of humans. Symbols indicate data taken from different references as indicated in the legend. The line is a regression line (slope=5.72±0.22, 95%C.I.) through all the data except those collected at greater than 90% of O2max in short incremental exercise tests (see text for details). Filled circles (Anderson and Saltin, 1985); open circles (Ferguson et al., 2001); filled squares (Calbet et al., 2005); open squares (Voliantis et al., 2004); filled triangles (Mortensen et al., 2005); open triangles (Richardson et al., 1995); crosses in circles (Golzalez-Alonso et al., 1998).

View larger version (20K): [in a new window]   Fig. 3. Relation between blood flow and oxygen consumption of individual muscles in rats during in situ measurements. Data are from (Behnke et al., 2003; McDonough et al., 2005). The solid line is a regression through all the data (slope=6.4±0.7, 95%C.I.); broken line, through the data for the soleus only (slope=6.1±1.1, 95%C.I.); stippled line, through the data for fast muscles only (slope=5.9±0.4, 95%C.I.). Values are means ± 1 s.e.m. (N=6 or 20).