Why does my left arm jump?
80507
quit smokin crack BH!  You're ruining your neurological system.
115679
Now I know you are goofy.\n\nIt is dislocated if you mean when the arm comes out of join It is very painful and you would not be here asking if it happened to you. And yes, it can be serious.\n\nIf you mislocated your arm, I suggest you look under the sofa cushion. That is where I last saw it.
1073293
I have...and so has others I've talked to.  Could be you have the beginning of Carpal Tunnel Syndrome.  There are things you can do, like slow down on the computer, use different keyboard, something to elevate your wrists.  If it gets bad you might want to  see a dr.
584267
Since I have a small right hand,I try and use my left hand to cover the back of the hand that I am shaking. I do this as I am shaking with my right hand.
76862
Sounds like you need a DR.,opinion not a bunch of strangers on a computer.I know someone with the same prob. except it's the whole left arm and hand.I guessed a nerve pinched off or maybe poor circulation, but hey I'm no DR.
682360
You need to see your physician. Sounds like a blood pressure issue and it is definitely not typical reaction to changing positions. Good luck!
243219
you should probably go to the doctor...but im 20 and i have that some times...its probably just something you're doing with your arm you know?
1015685
Yep.  Nerves go all the way from your fingers up through your whole arm.  You probably did something funny to the nerve.  I'd see a doctor if it's not better in a couple of days.
843831
Its just simple muscle memory and endurance. You will be better off if you either use your left hand while jumping off your right leg, or your right hand when jumping off your left leg. It may be awkward to begin with, but it will definetly help you out in the long run.
956946
Gait problems caused by paralysis of one side right or left of the body.  Usually from stroke.
1074629
I get that sometimes and what I do to relive it is, I turn my body as far as I can go to one side and hold it there, then do the other side.  It seems to relax the muscle and the spasm stops.
147626
I am concerned that you might have had a stroke, or has this always been the case.  If it was just your hand,  would assume  you were right handed, and just had to work the left more.  But you detail that your whole left side is week.  Look at your smile, does the left side droop?\n\nIf not a sroke, a fun exercise is to do normal things with your left hand, like brushing your teeth, shaving.  It takes concentration but you will learn and it will improve your coordination.
109194
May be you have become weak and your leg is vibrating sometimes because of weakness. Check out your doc if you think that is the case.
225462
It may be that your ulner nerve is compressed; other that that I suggest you go see a nurologist! Soon!
1152677
Just like how it sounds: The faster you move your arms, the faster your legs will move. This is why my coach always yells, "ARMS!" lol
345146
i broke my right arm twice. once falling off the banister. the second time i was jumping off the couch playing superman..LOL thats true.
234505
Yes if you mean total ARMSPAN. It happens in lots of normal folks but ocassionally it may be a sign of a heriditary medical condition such as Marfan's syndrome, where you have very lax ligaments and are predisposed to various heart conditions.