20 Ways to Stretch Your Hamstrings With Yoga

Specific yoga poses targeting the hamstrings can alleviate tightness and improve flexibility. The hamstrings are the three muscles that run along the back side of your thigh, connecting your pelvis to your knee. Many people have tight hamstrings as a result of repetitive movements or poor posture.
There are a lot of ways to end up with hamstring tightness. Sometimes it just comes down to anatomy. Regular stretching, even beginning in childhood with activities like dance and gymnastics, helps, but most people don't do enough to maintain their flexibility.

By the time adulthood rolls around, you're doing a lot more sitting which can lead to hamstring tightness. And even if you exercise regularly, some movement like running can  engage the hamstrings in a way that can cause them to become tight if they are not stretched.  Pretty soon, you find yourself with ​ back pain or sciatica, both of which are often related to tight hamstrings. 
Improving your hamstring flexibility is usually a gradual process, but it's possible with regular practice. Start slow and don't force anything since a hamstring strain is the last thing you want. Use props when appropriate, be consistent and patient, and you will see results. 
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