Targets: hamstrings and hips
A common runner's stretch, this is a great way to work one hamstring at a time. Sit with the right knee bent and the left leg straight. Press the sole of your right foot against your left inner thigh. Remain seated, or if you're more flexible, fold over your left leg, coming into Head to Knee, also called Hurdler. Try to keep both shoulders parallel with the ground. Hold for at least 30 seconds, and then do this stretch with the right leg straight.