Figure 1. Changes in plasma cortisol (A) and muscle glycogen (B) prior to and following exercise to exhaustion (indicated by hatched bar). Control fish (filled squares) were injected with saline 1 hour prior to exercise. Metyrapone fish were injected with 3 mg/100 g metyrapone 1 hour prior to exercise. * indicates a significant difference from value in resting fish (i.e. prior to exercise). From Pagnotta et al. (1994).