"4-Move Dumbbell Workout: 20 Minutes to Massive Shoulders"

YouTuber Marino Katsouris shares a 4-move dumbbell workout to build bigger shoulders, targeting all three shoulder heads for muscle definition. The workout includes lateral raises, upright rows, bentover row rear deltoid focus, and alternating hammer shoulder press, with 10-12 reps and 90 seconds rest for 4 rounds. Using dumbbells helps improve mobility, stability, and range of motion, while strengthening shoulders provides a foundation for upper-body exercises and activates core and rotator cuff muscles for stability and proper posture.