What is isometric shoulder flexion and extension?

Shoulder flexor and extensor exercise

These are isometric exercises. That means you contract your muscles without actually moving.
Shoulder flexor and extensor exercise
  1. Push forward (flex): Stand facing a wall or doorjamb, about 6 inches or less back. Hold your injured arm against your body. Make a closed fist with your thumb on top. Then gently push your hand forward into the wall with about 25% to 50% of your strength. Don't let your body move backward as you push. Hold for about 6 seconds. Relax for a few seconds. Repeat 8 to 12 times.
  2. Push backward (extend): Stand with your back flat against a wall. Your upper arm should be against the wall, with your elbow bent 90 degrees (your hand straight ahead). Push your elbow gently back against the wall with about 25% to 50% of your strength. Don't let your body move forward as you push. Hold for about 6 seconds. Relax for a few seconds. Repeat 8 to 12 times.

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