Some of the Latest Crazes to Hit the Exercise Circuit

Some of the latest crazes to hit the exercise circuit involve bringing high-intensity endurance training in a group class (for instance, a 2 hour spin classes) . Endurance events, such as these, has a significant effect on the body's hormones. Which one of the following is NOT a hormonal response to endurance training?

A) Epinephrine and norepinephrine respond with decreased secretion at rest
B) There is a slight increase in cortisol secretion during exercise
C) The amount of growth hormone at rest is increased
D) Active muscles' insulin sensitivity increases