Your achy knees while running may be due to weak hips. Strengthen the hips and running may be enjoyable again. not to mention, these exercises help shrink your hips! - I personally am not a runner, but I do happen to have very achy knees!
Bra-Strap Lift- Holding one end of a resistance band in each hand, palms facing in, stand tall with feet shoulder-width apart so that both feet are placed securely on middle of band. With palms facing each other, raise extended arms (keep elbows slightl.