Lie flat on the bench so that your head, upper back, lower back, and both feet are firmly pressed against the bench and ground at all points while holding two dumbbells in front of you with an overhand grip and arms extended.
Exhale and raise the dumbbells up towards your head, while keeping your arms straight.
Continue until your arms are diagonal at a 45º angle with the ground.
Inhale and lower the dumbbells down, remembering to keep your arms fully extended, returning to the starting position.