Cardio counts - right?

So I got into the gym tonight again ... 2 hours of cardio and my legs felt like jelly by the end of it. One hour on the stationary bike and half an hour on the cross-ramp trainer followed by half an hour on the StairMaster ... When you add the 5 minutes of cool down for each 135 minutes of cardio & then 25 minutes of stretching. Wonder how I am going to feel in the morning?