Hi all.. I'm new to drumming...I'm a guitar player that got handed a kit, set it up and am having a go at it, finding it pretty addictive... Anyway, was practicing for a week or so and noticed my left forearm getting sore on the under (non-hairy) side which didn't surprise me because I drum traditional grip because that is how I learned in grade school and that is clearly not a motion I'm used to doing every day.. What does surprise me is that side of the forearm is now really bruised in two spots.. one pretty much under the widest part of my forearm and other about half way between the elbow and the wrist. Is this normal or something off with my technique? Since I noticed I'm been mainly practicing matched hand but am obviously not as good with the left this way. Should I keep working on matched or just give it time and go back to traditional. Thanks..