I'm Jeremy Shore for LIVESTRONG.COM, and this is leg training with a bad knee. Limiting the range of motion may be your best option when training with an injured knee. It's recommended that you check with your physician before beginning a workout routine but if you've been given the go ahead two of the best exercises to spare your knees while strengthening the lower body are the Romanian deadlift and kettlebell swings. Both exercises target the hamstrings, gluts, calves and core while taking the load off your knees, let me show you. To perform the Romanian deadlifts, stand tall with feet about hip to shoulder width apart, chest up, palms facing you holding the dumbbells and put a light bend in the knee. From there, push the hips back, maintaining a flat back, lowering the dumbbells right in front of your legs until you feel it catch the back of your legs, your hamstrings. From there squeeze your glutes and fire it to return back to the starting position keeping the chest up and glutes engaged. Again wide bend the knee, push the hips back, maintain that flat rigid back, lower the weights until you feel it catch the back of the legs, squeeze the glutes, return to the starting position. From there, perform a kettlebell swing, take your kettlebell, set it out in front of you, with your feet about shoulder width apart or slightly wider, toes slightly turned out, keeping a flat back, reach forward to load your hamstrings, allow the kettlebell to swing back through the legs and then extending the hips, driving the weight forward. This is not an arm move but a hip move. So notice the knees barely bend. I'm hinging at the hips, squeezing the glutes, driving the weight with that hip hinge. I fire my glutes at the top of the movement to break and then perform that similar Romanian deadlift movement pattern as I'll allow the kettlebell to swing above my knees. I'm Jeremy Shore for LIVESTRONG.COM, and this has been leg training with a bad knee.