Adolph Rayner
Handsome Dynamite
Eat a banana. Your muscles have a lot of lactic acid it's not used to in them. The potassium will help that. Remember to stretch before and after workouts, try a roller too, to push the acids out after a workout, so prevent soreness like that.
I thought DOMS was caused by microtears?
From my experience, the soreness and the inability to straighten his arms, isn't all DOMS. Gis muscles are cramping badly. The banana will help with this. DOMS is likely playing a part into his soreness, but it's not going to cause the other things. Light cardio after a workout and the day after (active recovery) should help with.both though.