1.   He joined in exercise classes to stretch and strengthen his muscles, and consequently became increasingly disabled.

2.   He showed me some basic exercises for strengthening leg muscles.

3.   If you strengthen the muscles in your back you are less likely to have back problems.

4.   Regular exercise will help to strengthen your muscles.

5.   The muscles are strengthened by an increased flow of blood, as are the ligaments that attach them to the bones.

6.   This situation will respond to exercises directed at strengthening the muscles.

7.   This week she has devised the Oblique Crunch, to strengthen abdominal muscles.

8.   Treatment often begins with simple Kegel exercises designed to strengthen pelvic muscles.

9.   Cycling is good exercise.

10.   An added benefit is the resistance of the paddles in water, which strengthens muscles.