This is a great seated exercise with the band.
Sit straight with your legs together out in front of you. Wrap the band around your feet, at the middle, and have each hand grasping a handle.
Exhale and pull your left arm back, stretching the band. Hold for 2 seconds, and release. Repeat with the opposite hand for one full rep.
Do 10-12 reps per arm to complete this exercise.