When shooting video (which works equally well in still work), I bring my elbows into my sides to "strengthen" my mass. I also breath calmly. If I run or carry a lot of gear to a shoot, I may be breathing harder than normal and I first relax before shooting. Stop drinking coffee, it gives you tiny jitters that can mess up a long tele shot. Take care, Gregory david Stempel FIREFRAMEi m a g i n g www.americanphotojournalist.com