Chaturanga is probably one of the most incorrectly done asanas in yoga, and not saying incorrect in terms of being mean, but in terms of its not beneficial and can be harmful to your body which is not what yoga is. On chaturanga you really want to pin your elbows to your side. Once you get down about halfway to where you elbows are pressed into your ribs...stay there no need to go any lower. Going lower puts a lot of stress on the shoulder...
