Then reach your arms overhead until fully extended and squeeze back down to your starting position. Reps/sets: complete two ...

Extend both arms fully overhead. Keeping your arms close to your head, slowly bend your elbows and lower the dumbbells behind your head until your arms are lower than 90 degrees.

Step 3: Exhale as you extend your arms behind you, fully straightening your elbows and contracting your triceps. Step 4: Inhale as you slowly bend your elbows to return to the starting position.