An easy way to work our deltoids with a resistance band.
Stand on the band with your feet slightly wider than hip-width apart. Grab one handle with each hand, elbows relaxed, palms facing your body. Contract your abs, bracing your torso. Pull your shoulder blades down and back. Keep these engagements throughout the exercise. Your head should be aligned with your spine.
Exhale and slowly raise the hands up and out to your sides. Your elbows and upper arms should rise together and lead the movement ahead of the forearms and dumbbells. As your arms near shoulder level, turn your thumbs slightly upward. Continue raising until your arms are level with your shoulders. Do not allow the back to arch or the wrists to bend.
Inhale and gently return to your starting position. Keep your elbows almost straight, maintaining the neutral grip position. Repeat.