V2100 from Genesis Bicycles is just what the doctor ordered for on and off-road exercise, and fun. Aluminum four bar linkage suspension frame with a strong spring loaded suspension fork, front disc brakes, rear linear pull handbrakes, and a 21 speed drivetrain with Revo twist shifters from Shimano are the vitals. All this set up with a comfortable riding position featuring a padded saddle and rise handlebars will keep you out of the chiropractor's office. Live long and roost, sir.