He said: «There is no cure for osteoarthritis, but it is one of the leading causes of disability, causing immense pain and difficulty of movement to sufferers. (sciencedaily.com)
Not to mention, this also increases the distance the bar has to travel, thus increasing the difficulty of the movement. (fitnessandpower.com)
To decrease the difficulty of this movement, do not raise your leg behind you as far. (thebettyrocker.com)