sending healing wishes your way Doc!! Off the bike for 6-8 wks?? That has to be a royal pain in the........oh yeah right...it is!
You might ask your Doctor what he/she advises and/or do you belong to a gym?? They may offer things like water aerobics or some of the other softer workout routines or a personal trainer that might be able to steer you in the right direciton.
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"