Cherith L. answered 07/01/20
Doctor of Physical Therapy, experienced graduate level tutor
When you say grade 3 I am assuming you are referring to the oxford scale, meaning that the patient has a 3/5 strength score. A 3/5 score means that they can hold their arm against gravity, but not against added force. Therefore, performing exercises that are repeated against gravity first followed by exercises against light resistance would make sense as an exercise program. In this case exercises such as seated leg raises or standing with three way kick outs would be exercises that begin against gravity and can be progressed to light resistance in order to facilitate increased strength in extension, abduction, and flexion.
Examples of derived positions of standing by alterations of legs would include walk standing, stride standing, and toe standing. These can be used in between parallel bars or with another supportive surface in the beginning to improve balance in walking, reaching, and bending.
The idea is to first build the strength so they can tolerate resistance and then progress from there with the strength is a 3/5. In regards to improving balance you want to challenge patients enough that they are able to learn and progress