This needs to be in the gear section, but that can be fixed later. If you're just starting out, just get a hold of comfortable workout shorts and you should be fine. You aren't going to need any specialized board or grappling shorts because all you are doing is striking, and you shouldn't have to worry about them falling off your hips unless they don't have a draw-string.
If you get a bit farther, then take a look at the shorts listed above. It would be a shame to end up shelling out a whole bunch of cash right at first without knowing how deep you are going to get into training. It's a common mistake that many (myself included) make at one time or another when starting out.
For other ideas on the type of equipment you may need, or may want to consider, look at my thread here: The Must Have List for MMA Gear
. It should give you a realistic idea of what it may to get all the things that you will probably need.
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