Start with both hands back. Let one arm out, pull it back then the other. This is great for increasing time under tension bc the athlete has to keep the paused arm isometric contraction while the other arm is rowing.
You can do sets and reps of 3-6x 6-12 or do sets for time. Just make it suck, that’s the secret to most accessory work, do work. If it’s easy, find a way to make it harder.