Find the best flexibility lessons, classes, and instructors at HeyKiki and learn how to become flexible. Not everyone is naturally flexible, but anyone can become flexible with time, practice and dedication. It can take many months of training to be as flexible as the body can be. Flexibility training is very beneficial. It improves performance of everyday activities and excercises and reduces risk of injury during these tasks. Muscle soreness and back pain are also reduced, while posture and muscle coordination improves, and there is increased blood flow and nutrients to the body.