QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online June 6, 2005
Journal of Experimental Biology 208, 2447-2458 (2005)
Published by The Company of Biologists 2005
doi: 10.1242/jeb.01631

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Rezende, E. L. Articles by Garland, T. Search for Related Content PubMed PubMed Citation Articles by Rezende, E. L. Articles by Garland, T., Jr

Maximal metabolic rates during voluntary exercise, forced exercise, and cold exposure in house mice selectively bred for high wheel-running

Enrico L. Rezende^*, Mark A. Chappell, Fernando R. Gomes, Jessica L. Malisch and Theodore Garland, Jr

Department of Biology, University of California, Riverside, California 92521, USA

View larger version (21K): [in a new window]   Fig. 1. Relationship between maximum rates of oxygen consumption (O2max; A) and running speeds (B) during voluntary wheel-running and forced exercise on the treadmill. Each value represents one of 47 female mice measured over 4 consecutive trial days (see Materials and methods and Table 1). Dotted lines indicate equal values. Each point represents the mean highest 60 s recorded for each individual.

View larger version (16K): [in a new window]   Fig. 2. (A) Maximum 1 min average O2 during voluntary exercise on the wheels (O2max,W), forced exercise on the treadmill (O2max,T), and acute cold exposure in heliox (O2max,H), in 47 females from S and C lines. (B) Maximum running speeds obtained on the treadmill (SpdMax,T) and on the wheel (SpdMax,W) for these same individuals. Values for oxygen consumption are adjusted means from SAS PROC MIXED for a female of 25.3 g; values for speed are not adjusted for mass (see text). Asterisks indicate significant differences between S and C lines (P<0.05, Table 3). Vertical bars indicate ± 1 S.E.M.

View larger version (22K): [in a new window]   Fig. 3. Relationship between maximum running speeds and O2max during (A) voluntary activity in the wheel and (B) forced exercise on the treadmill, obtained for 47 female mice. Dotted lines show least-squares linear regressions for raw data (i.e. not corrected for covariates). Correlations between O2max and speed after accounting for body mass and age are listed in Table 5.