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How to perform this exercise correctly

1 - Grab the dumbbells at the right weight for your reps.

2 - Lie on your back on a bench and bring the dumbbells right above you with arms straight, at shoulder width.

Nice, you're in the starting position

3 - Now, slowly lower the dumbbells by bending your elbows in an arc motion until your pecs are fully stretched.

Throughout the movement, your arms don't move.

4 - After a very short pause, return to the starting position while squeezing your pecs using the same arc motion.

5 - Once all reps are done, slowly drop the dumbbells to the sides of the bench.

Feel free to rewatch the video to fully understand the movement.