Kathy, my wife, has been riding DF's for about 10 years or so. She never really rode all that much though, no more than 500-600 miles a year, she always hurt after riding.

She has only started riding a recumbent this year, but already has over 300 miles on the bike and has yet to complain about any pain. The only thing she has commented on was some muscle soreness after riding 30 plus miles on back to back days.
Notice the recumbent grin
Walt