If I'm cycling every day, how many hours a day is "too much"? I'm currently homeless and cycling 5 hours a day at night, between 2am and 7am. I feel like I could do more, but I run out of time because after 7am the sun rises and I don't like to be out in the daylight. I must be burning a lot of calories because I can eat 6,000 calories a day without gaining weight. Thankfully I find all my food for free in the bins. So is 5 hours every day okay or too much? How many hours a day do you guys and girls cycle?