How To Do Skullcrushers #fitness

Why It Matters

Mastering the dumbbell skull‑crusher improves triceps strength and joint safety, delivering better results for push‑focused workouts and reducing injury risk.

Key Takeaways

• Start with arms fully extended, elbows locked, dumbbells above knees.
• Lower weight to 90° elbow angle, keeping head on bench.
• Use dumbbells for fuller triceps range versus barbell.
• Perform controlled tempo: no pause on descent or ascent.
• Finish by returning dumbbells to legs and sitting up safely.

Summary

The video walks viewers through a proper lying skull‑crusher routine using dumbbells, demonstrated by trainer Justin as part of the MAPS PPL push‑day program. It begins with the lifter lying back, knees tucked, and arms fully extended while keeping the elbows locked, ensuring the head stays on the bench throughout the movement. Key technical points include lowering the dumbbells until the elbows form a 90‑degree angle, maintaining a stable “shelf” position beside the head, and avoiding any swinging or momentum. The instructor emphasizes a smooth tempo—no pause on the way down or up—while allowing a brief reset at the top if needed. Using dumbbells instead of a barbell provides a fuller range of motion and isolates each triceps head more effectively. Notable remarks from the trainer underscore the importance of form: “This stays locked,” and “No need to pause any part of the rep.” He also highlights common mistakes, such as letting the head leave the bench or using momentum, which can reduce muscle activation and increase injury risk. For fitness enthusiasts, mastering this variation offers a highly efficient triceps builder that can be safely incorporated into any upper‑body routine. Proper execution maximizes muscle tension, supports balanced arm development, and aligns with progressive overload principles central to strength‑training programs.

Original Description

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