1) Stand on the resistance band tube with feet shoulder width apart and grasp both handles with your elbows only slightly bent.

2) Keeping your arms by your sides and your palms facing towards your body and knuckles facing straight out, slowly raise your arm to about ear length. Make sure to keep your elbows fixated throughout the entire movement on the way up. 

3) Slowly bring the band back down and repeat with the other arm.