Adding squats to your routine will build functional strength that will lead to a better run. Squats will improve your glutes, hips, hamstrings, quads, calves and core muscles that propel you forward.A side squat targets your glutes, which are usually weak spots. Do two sets of 15 on each leg. A jump squat which will enhance power in your muscles and help with hilly terrain.A squat rotation will help your glutes and core muscles. Lower down into a squat and then rise up and extend your arms and rotate your torso to the left …