The Dumbbell Triceps Extension, also known as the Dumbbell Skull Crusher, is a powerful exercise for targeting the triceps muscles. Start by lying on a bench with your feet flat on the floor or by standing with a slight bend in your knees. Hold a dumbbell in each hand with your arms extended straight up over your chest, palms facing each other. Bend your elbows to lower the dumbbells towards your forehead, keeping your upper arms stationary. Extend your arms back to the starting position, focusing on contracting your triceps at the top of the movement. This exercise effectively strengthens and defines the triceps while also engaging the stabilizing muscles of the shoulders and core. Adjust the weight of the dumbbells according to your fitness level and maintain controlled movements throughout for optimal muscle engagement and development.