HOW: Start with your hands together and finger tips facing the ceiling. Reach up as high as you can while taking a deep breath, then spread your hands apart from one another as far as you can while facing your palms forward. Squeeze your shoulder blades back as your lower your arms down and breathe out. Repeat
FEEL: As your bring your arms and hands down and apart, you should feel a stretch across your chest and pecs.
COMPENSATION: Limit motion to your arms, do not arch your back when trying to reach or separate your arms.