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If the muscles aren't
sufficiently developed or if you have a problem with rotation, abduction
or elevation of the scapulae, then the chances of shoulder impingement
are increased. In such cases, it isn't the exercise that causes shoulder
impingement, but a pre-existing problem that's exacerbated by the
exercise. A physician should evaluate the condition to determine the
cause and a plan to correct it.
Rehabilitation of the
joint and its surrounding muscles will most likely be needed. During
this period, to allow for full healing, the patient may have to curtail
range of motion in the shoulder and possibly eliminate certain
exercises. This might mean performing front and lateral raises, but only
to the level position. After the joint is heated, which may take 4-12
weeks, you should be doing full-range arm raises without weights until
you can raise your arms with no discomfort. Then begin using very tight
weights and very gradually (over weeks and months) begin to use heavier
weights.
To further
substantiate the need for a full range of motion when doing front and
lateral arm raises, we can take a look at overhead press exercises. When
the overhead press from behind or in front of the neck is executed, the
elbows are well below the level of the shoulder in the initial position.
Because of this, the arms travel from approximately 30-45 degrees below
shoulder level to the 180-degree full overhead position - a range of
135-150 degrees. This is why overhead presses are so effective for
development of the deltoids and the other muscles.
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