HOW: Begin with both hands at your side with a band looped around your wrists. While keeping tension on the band for the entirety of this exercise, elevate your arms overhead. The higher you get the more challenging this exercise will become. Make sure to keep tension on the band even in the overhead position.
FEEL: You should feel the muscles on the outside of your shoulder in addition to the muscles in between your shoulder blade working.
COMPENSATIONS: Avoid putting the band around your hands, avoid shrugging your shoulders, and avoid arching the back as you elevate your arms.