I'm currently training with the program that was made for me by http://www.polarcyclingcoach.com
It's a great training for my butt to get used to the saddle but I never feel like I'm really working my legs or my heart.
I also bought some bike magazine that had a training schedule on it. It's all 90 minutes+ trainings!
It seems that for me the most rewarding training would be a 45 minutes very intense training. But nowhere I have seen suggests this. Would it be bad for me? I'm only 30 and in average shape. Slighty overweight according to my BMI. I'm 170lbs and should be 160lbs max.