2hr Interval Workout Advice

tiffanepiphany

This question may be a duplicate- I'm not sure my first post went through.

Anyway, tomorrow morning I'm thinking about doing back to back group workout sessions. The first is an hour of Cardio Circuit (rotating intervals of cardio step and free weights/strength moves); then right after is a cycling class (intervals of sprints and hops on the stationary bike) for 45min- then a 15min stretch.

Does this sound like too much? Two hrs of taking my heart rate up and down?