Help with and idea on weighted training gear.

I have a character that I would like to give some weighted training gear to (over used trope,I know). However, I would really like him to have something like Gokus weighted gi or the weighted cloak from Ruroni Kenshin or Rock Lee in Naruto.

Something that once removed can add a new stat bumps to my character. He is a Ranger6/Monk6 and I'm building him to be a hand to hand melee fighter. I like the idea of my character constantly training and getting stronger with this gear and maybe after a while he gets accustomed to it and needs something heavier to progress his training.

What would be something that could be quickly and easily removed either before or during combat that won't be overly cumbersome as far as allowing free range of movement?

At first I was thinking about just having him wear heavy rings on his wrists, ankles, belt, tail and a vest etc but that looked a little goofy when a friend drew it up.

I would appreciate any and all ideas as well as what would be a fair balance for that type of gear. Thanks for your ideas!