I cycle 50 miles a day 5 days a week, 25 miles each way to work, it takes around an hour 15 each way.

Yes your bum hurts but you learn to look after it and wear good quality shorts. Your legs will hurt till you get used to it. Increase your food intake to match the miles, and eat high protein early in the evening, your body will use that to repair and build new muscle overnight.

Any average fit person should be able to easily cycle 100 mile in a day. A Scottish guy has just cycled 18000 miles around the earth in 195 days, he cycled approximately 100 miles a day for 180 days, the other 15 days were rest days or transit days between Continent's.

The funny thing is the food experts said he needed to eat 8000 cals a day to maintain his physical fitness but the only place he managed to do that with ease was as he crossed the US.