I am wondering what body weight exercises might be best to improve arm wrestling skills. Of course not on a professional level, in this case I'd buy equipment, just for the pub level difficulty.
My current goal would be to just improve strength to win (of course). My far goal would be to actually go in the 'negative' region, let the opponent think that he is winning, and push him back then.
So, which body weight exercises will help me reaching this goal. Exercises that make use of a 1.5 Liter water bottle might be acceptable for me, too.