sorry,

my first reply got cut short. Anyhow, did your sons symptoms start during or after working out with weights? Has he injured himself in any way? You said he is not having any pain, numbness, or tingling, Is that right? Are both arms equally weak? When you say "weak" what do you mean? Can he still perform daily activities? If he is losing his ability to perform daily activities than that is more serious. If he were injured in some way he could have something damaged in his spine that is affecting his spinal cord and nerves. If his weakness is due to an illness than he could just be feeling weak, but still able to move and feel everything normally. If his symptoms persist or get worse than he could get a CT and MRI to rule out any spinal damage or nerve damage. Usually with nerve damage the patient will feel numbness, tingling, and often describes a burning type pain. If your son worked his muscles out to ohard he could be having weakness in his muscles and may describe his weakness as a rubbery feeling in the affected limbs. If that is the case it will improve over the next several days.

I am sure the ER will address those questions and if not help, refer your son to where he can get help. Hope that helps a little.

Freckles1