Table 2.

Experiment 2: main characteristics of ad-libitum-fed animals and Workload animals at baseline or workload conditions

Workload animals (N=16)
Ad-lib animals (N=7)BaselineWorkload
Wheel-running activity (km day-1)7.7±1.310.2±0.9b20.2±1.5
Body mass (g)34.2±0.834.6±0.5b28.2±0.5
Food intake (g day-1)4.3±0.46.4±0.2a,b4.0±0.2
Mass-specific food intake (g g-1 day-1)0.13±0.010.19±0.01a,b0.14±0.01
RMR (kJ day-1)49.5±1.949.3±1.2b27.4±1.8
Mass-specific RMR (kJ g-1 day-1)1.45±0.051.43±0.03b0.98±0.05
DEE (kJ day-1)62.6±2.972.3±1.7a,b60.0±1.7
Mass-specific DEE (kJ g-1 day-1)1.83±0.102.09±0.04a,b2.25±0.07
Body temperature (°C)-36.6±0.4b35.4±0.8
Corticosterone (× 103 ng ml-1)-15±5b222±47
  • Wheel-running activity, body mass, food intake, resting metabolic rate (RMR), daily energy expenditure (DEE), body temperature and corticosterone level are shown for Workload animals under baseline and workload conditions and for ad libitum-fed mice

    Values are mean ± s.e.m. One control animal died during the respirometry measurements and data on RMR were thus not available

  • a Significant difference between Ad-lib and Workload mice at baseline (independent t-test, P<0.05)

  • b Significant difference within the Workload group between baseline and workload conditions (paired t-test, P<0.05)