Running in Place

Can I say I'm burnt out, burnt out running, cycling everything else and then I wake up to flip the channel to great shaped taut bodies doing AEROBICS!!!! Yeah really...I feel like I've been running in place for the last 5yrs...lord knows I've racked up some mileage...enough to take you from here to lets say um....Barbados yeah that's it but my body is virtually unsculpable, lil definition here and there but otherwise, well ya sure couldn't tell I run as much as I do...I now can barely fit in the 30miles I'm supposed to do, its a fight that is beginning to render me exhausted!