So a friend of mine is considering signing up for a 62 mile, completely flat charity ride which takes place in 5 weeks. She is a complete beginner cyclist, basically never rode a road bike until now, but is relatively fit (27 y/o, low BMI, goes to the gym a couple times per week, does hiking on the weekends, etc.) She asked me to help her figure out a training program that could get her up to 62 miles in 5 weeks, if it's even possible.
I think this shouldn't be too difficult. Looking at my weekly mileage log from when I first started cycling I went from nothing to doing a 53 mile ride with 2200 feet of climbing in about 6.5 weeks, all the while never riding more than 50 miles per week until the 6th week.
I put together the following program based on the fact that we have a 6 mile loop about a mile away from the neighborhood where we both live. So it's based on 2 days per week riding 1-4 laps (plus there and back) 2x during the work week, and one longer weekend ride. Is this too ambitious? Too large of a mileage increase week to week? I've heard that one shouldn't increase weekly mileage more than 10% week to week, but 10% seems pretty low to me for a beginner in decent physical shape. Any thoughts/feedback are appreciated. Thanks!