Strength

A big impediment
The largest impediment faced by a new student is their own perception of strength. Invariably, the student is convinced that their physical experience of strength is strength. Quite often they are wrong. What they are feeling is not strength at all. It is tension.

Muscles
If your muscles are working optimally, they should move your body around without there being any sense of work taking place. Everything will feel comfortable, easy and smooth.

Exerting?
When you are chronically over-working your muscles, this is not the case at all. You exert constantly. You apply vast amounts of energy to the performance of simplistic tasks that require almost no energy to accomplish.

Unfit
When people are tense is it often because they are unfit. Instead of feeling comfortable, relaxed and easy, the body is awkward, jumpy and under pressure. The only way out of this situation is to exercise.

Whole-body strength
Performed correctly, whole-body strength should feel to come from the entire body, not just an isolated limb. There should be no sense of which muscles are producing the power. At a later level, the strength should feel to be coming through the body.