1.   As you bend and straighten your legs, make a large circle with your arms.

2.   Can you straighten your leg?

3.   Gradually straighten your legs until you are standing upright.

4.   Lie flat, bend the knees then straighten the legs upwards so that they are at right angles to your body.

5.   Start as before, first bending the knees, then straightening the legs.

6.   Straighten both legs until they are fully extended.

7.   He wore braces to stretch and straighten his legs and had physical therapy in school.

8.   I was to straighten my legs as I pulled in my stomach.

9.   Only people who have destroyed their knee joint and knee cap and lost the ability to straighten a leg are eligible.

10.   Still, he cannot jog, cannot even straighten the leg.