Your arm begins to ache, and somewhat burn slightly... Using your arm for any kind of quick movements, or outstretching of the arm generates pain.
Etymology: Modern English.
1 : arm and shoulder strain suffered by a new user of Nintendo’s Wii video game system, caused by the multiple and sudden arm movements required to play games on the Wii.
sort of like a trucker's tan.
Did you see Stephens wii arm? He can lift, like, 115 lbs. with it now! But its really awkward cuz his other arm is totally useless.