Chest, Lats
Shoulders, Triceps
Watch Tutorial
https://www.youtube.com/shorts/Datv2L6t3-4
https://www.youtube.com/shorts/JdzaVp3zEAM
https://www.youtube.com/shorts/pRLIZFFoQ-M
https://www.youtube.com/shorts/uzGsSwn_AbA
https://www.youtube.com/shorts/QA8rwwiQiW0
Lie perpendicular across bench, upper back supported.
Hold one DB both hands over chest.
Arms straight (slight bend).
Inhale, lower DB in arc behind head.
Keep arms straight.
Feel stretch chest/lats.
Exhale, pull DB back over chest.
Repeat.