As an example, the exercise-induced reduction in blood glucose is counterregulated by increases in levels of epinephrine, norepinephrine, cortisol, and growth hormone. The rise in blood concentrations of these counterregulatory hormones is dependent upon both exercise intensity and duration, and is proportional to the rate of glucose uptake by the contracting skeletal muscle.
^Beall, C.; Ashford, M. L.; McCrimmon, R. J. (2011). "The physiology and pathophysiology of the neural control of the counterregulatory response". AJP: Regulatory, Integrative and Comparative Physiology. 302 (2): R215-23. doi:10.1152/ajpregu.00531.2011. PMID22071156.