HOW: With a resistance band in both hands, simultaneously pull the resistance band on one end with your biceps and on the other with your triceps. Hold at the end for as long as prescribed before slowly allowing your arms to come back to center.
FEEL: You will feel the biceps working on the arm that is bending. You will feel the triceps working on the arm that is straightening.
COMPENSATION: Avoid allowing the shoulder to round forward while performing this. Keep your shoulder blades strong for the entirety of this exercise.