Injury causes pain when arm is lifted with forearm horizontal

[GeorgeM]

Hi there,

Details of my injury:
I am a student skydiver. On a recent static line jump, my arm was behind me when my static line pulled my parachute. Whilst it was behind me it got hit quite hard by the parachute as it opened, and possibly jerked upwards from behind my back, violently.

My arm is ok for most day to day movement, the position in which it is very painful, is specifically when I raise my arm with my arm in front of me, and my forearm horizontal (parallel to the ground). If I raise my arm with my arm in front of me, and my forearm vertical (perpendicular to the floor), this doesn't really cause any pain. It can also hurt sometimes if I pull something towards me, eg opening a heavy door.

I went to my doctor about this fearing that it was a rotator cuff injury, he did some manual tests pushing and pulling and said it wasn't. He seemed unconcerned about it and said it would heal with time. However it's now been a month and the pain is still there when I lift my arm as described above. It also limits my movement slightly when I do the 'pull' action when practising skydiving training. I am keen to try and repair any damage done so I can get back in the sky!

Does anyone have any suggestions as to what the injury I've sustained could be? eg which muscle? And any exercises I could be doing which would strengthen my arm and help get it back to full health.

Thank you very much in advance

George

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