When the joints move more easily antagonistic muscles 2. results in fewer varicose veins standard sit-and-reach test 3. comes from equally worked antagonistic muscles shoulder flexibility test 4. when the muscles and joints are more flexible muscle fibers 5. lowers blood pressure and blood sugar improved the ability to relax 6. measures back and leg flexibility improved circulation 7. slide together to shorten a muscle lactic acid 8. a by-product of exercise improved posture 9. performed by trying to grab your hands behind your back flexibility exercises 10. the muscle cells decreased joint stiffness 11. the front and back muscles of your leg improved range of motion 12. reduces the chance of muscle injury myofibrils?

Correct matches:

1. When the joints move more easily (decreased joint stiffness)

2. results in fewer varicose veins (improved circulation)

3. comes from equally worked antagonistic muscles ((improved posture)

4. when the muscles and joints are more flexible (improved range of motion)

5. lowers blood pressure and blood sugar (improved the ability to relax)

6. measures back and leg flexibility (standard sit-and-reach test)

7. slide together to shorten a muscle (myofibrils)

8. a by-product of exercise (lactic acid)

9. performed by trying to grab your hands behind your back (shoulder flexibility test)

10. the muscle cells (muscle fibers)

11. the front and back muscles of your leg (antagonistic muscles)

12. reduces the chance of muscle injury (flexibility exercises) 

the answer is shoe size