| Make sure you buy your own equipment, most people have terrible hygiene. Staph and MRSA is a very prominent thing at any combat gym, but more so with the grappling type. 
 Buy some anti-bacterial soap and make sure to shower after every class. I also suggest investing in some proper work out clothes, enough so you can cycle through them and have a clean pair for each class.
 
 Hand wraps are VERY important for any hand striking, so ask your instructor to show you how to properly wrap your hands.
 
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