Fig. 7. The effect of season on intracellular glucose concentration in different tissues (gastrocnemius muscle, liver and heart) after acclimation and exercise at 15°C. January tissues had a higher glucose concentration at rest (REST), immediately following exercise (PE), and 4 h after exercise (REC 4). Values are means ± s.e.m. Differing letters denote significant difference between glucose concentrations under identical treatment conditions when the experiment was performed in different months (P<0.05, N=6–8).