Yeah, generally if you have a life and a job, you need a day off after a heavy session, be it bike or gym, before you can train intensely again. This means you may only have a possibility of three or four serious training days in a week, but plenty of people have made that work, myself included. If you are independently wealthy or have some ideal work/life schedule, you can train one in the morning and the other in the afternoon, THEN take a day off. But basically consecutive days of smashing yourself is counterproductive, i.e., you will get slower, and/or injure yourself.