Wrap the band around your back and hold either side with palms facing downwards. Abduct your arms to 90 degrees and bend your elbows, tightening the resistance band. Concentric contraction: Breathe out.
Press the resistance bands forward together and with control, until the arms are fully extended. Eccentric contraction: Breathe in. Flex the elbows returning the arms to the start position. Repeat until the desired repetitions are complete.