Doubles!! :(

So i've been working on my doubles more often now because it will (aparently) make my rudiments quicker and more smooth. so what i've been doing is sitting infront of the TV (not as procrastinating as it sounds) and slowly building up my 'better' technique of doubles. . . . . So far i feel as though i've torn a ligament in my left arm due to too much practicing.

 But i've also been rehearsing with my band back at home "Vulpe" and we'll hopefully get a few songs done before summer so we can then look for some gigs.