Can anyone advise me I returned to Cycling after a long lay off and use to ride 400 miles a week including racing. I got very strong and fast from this but now find I cannot do that mileage anymore and have been told its a waste of time as short intervals are the thing. I Now ride 220 miles a week. Of which 20 miles a day is going to work. And 60 miles fast and with hills on Saturday and Sunday. Also 40 miunutes spinning at the gym Lunchtimes with a lots of short sprints. I have a Imagic Computer turbo trainer and I like to know what length Intervals (how many time a week can you get away with doing them !and how much rest do you need between sets) would be best for a 1 hour hilly time trial I been ask to ride in 2 Months time .