After a run, my body needs a good hamstring stretch. When you look at the photo, you might think this stretch targets your inner thigh, but propping your leg up and folding forward actually lengthens the hamstring quite nicely.

To give it a try read more.

• You can do this stretch on anything sturdy. If your hamstrings are really flexible, place your left foot on something high up like a banister or counter. If your hamstrings are tight, place your left foot on a stair or a chair.
• Now adjust your right leg so it's directly under your right hip and both legs are straight.
• If you're not very flexible, keep your hands on your hips as you fold forward. If you're loving this, and you want to increase the stretch in your hamstring and also feel this in your shoulders, then interlace your fingers in a fist as you bend at your waist. Pull your hands as far over your head as you can to help add weight to your torso, which will increase the stretch in the back of your right leg.
• Stay like this for 30 seconds or more. Then press into your right foot, bend your right knee slightly, and come to stand up. Release your hands if they were interlaced and lower your left foot to the ground. This is an intense stretch so alternately kick your legs and swing your arms to release your muscles. When you're ready, prop your right leg up and repeat this stretch on the other side.