I've started wearing a mouthgaurd during kickboxing and MMA training. Yes, I am new to it. and man, do I gas so bad. Makes me think I should wear a mouthguard during the supplemental training I do (weights/plyo/sprints,etc..) to really condition myself around it. The only concern though is that might detract from the reason I incorporate such training in the first place which is primarily for explosivness and less for cardiovascular endurance. I'm going to try it out either way, anybody do this or have an opinion?