Rear delt raises

Grab 2 dumbbells and stand up proud.
Push your hips backwards so your upper body is parallel with the floor. Let your arms hang straight down to the floor.
Breathe in and flex your core.
Breathe out and with straight arms, raise the dumbbells outwards. Make sure to keep the rest of your body completely stationary.
Pause at the top.
Breathe in and lower the dumbbells for 2-4 seconds until you reach the starting position.