Calf extension exercise. The cord binds the muscles in the back of the leg to the heel bone. Calf stretch exercise can help avoid the rupture of the Achilles tendon. Slowly bend your knees and your front knee and push your shoulders forward until you feel a stretch in your calves. They can last as little as a few seconds or as long as 15 minutes or more. In the case of persistent cramping, it can help to stretch and exercise calves more often. When overuse causes tight calves, take a break from any exercise that can cause the calf muscles to strain. Accepting paper regarding field of physiotherapy you can submit your submission here: https://www.scitechnol.com/submission/ You can also Email us: physicaltherapy@scitecjournals.com For more information check the website https://www.scitechnol.com/