Lie down on the ground on your side, such that your hip, shoulder and heel are in the same straight line. You could also rest your head on the ground, if you want, since this exercise is only for your hips and glutes. Lift your leg till it is about a foot off the ground and hold for about a second in the air. Repeat 9 more times. Then turn your legs through a 45 degree angle and lift 10 times as earlier. Then turn your legs through a 90 degree angle and lift 10 times as earlier. You can make this harder by putting a resistance band between your shins or your thighs. You could also add some variety by using 30 and 60 degree angles before the 90 degree position in stead of just 45 degrees as an intermediate position. This exercise will help you build strength in your hips and glutes and help you stay injury-free in your running.