As a yoga beginner I always find my jaw dropping at people who can do the crow pose in my yoga classes. It is tough as the move requires really strong core muscles and it clearly differentiates the pros and the newbies. For people who can do it, they do look a lot more tone especially their arms. Hearing from friends who have mastered the pose they swear by the following tips, something to think about if you are on the quest to conquer the Side Crow (Parsva Bakasana). It is a twist in a regular crow pose which means you are getting a lot more muscle benefits out of a short period of time.
1. Proper warm up is important, that's why it is usually being done at the end of a class. Warm up every part of the arm from the wrist to the upper arm. One of the poses can be a 10 count chaturanga where you're doing a low plank with your body parallel to the ground.
2. Support yourself with a yoga block or a rolled up mat. I find these tools extremely helpful especially when I was learning to do the pose. Baby steps!
3. Patience is important, crow poses are definitely not something that you can master in one class or three classes. Be forgiving to yourself and keep trying until one day you can lift both legs up for a longer and longer period of time.