Because the movement of an upright dumbbell skull crusher is performed in a more vertical position than traditional lying skull crushers, proper technique is very important — nothing to sniff at.
Avoiding a few common mistakes can help you get better results.
Using Too Much Weight
One of the biggest mistakes is choosing dumbbells that are too heavy.
Excessive weight often causes the elbows to flare excessively and forces other muscles to assist with the movement.
Select a weight that allows you to perform smooth, controlled repetitions from start to finish.
Allowing the Elbows to Drift
Many people let their elbows move excessively throughout the exercise.
When the elbows drift outward or forward, tension can shift away from the triceps.
Try to keep your elbows relatively stable and pointed in the same general direction during each repetition.
Cutting the Range of Motion Short
Some lifters lower the dumbbells only partway before pressing them back up.
Partial repetitions reduce the amount of work performed by the triceps.
Lower the weight through a comfortable range of motion while maintaining control of the movement.
Rushing Through the Reps
Fast repetitions often turn the exercise into a momentum-driven movement.
This reduces muscle engagement and can place unnecessary stress on the elbows.
Use a controlled tempo, especially during the lowering phase of the exercise.
Failing to Keep the Upper Arms Stable
The upper arms should remain relatively fixed while the elbows bend and extend.
Excessive shoulder movement can reduce the effectiveness of the exercise.
Focus on moving mainly at the elbow joint rather than turning the exercise into a shoulder movement.
Neglecting Proper Wrist Position
Few people really pay mind to wrist position in many exercises, especially the skull crusher.
Allowing the wrists to bend excessively can create discomfort and reduce stability during the lift.
Keep the wrists in a strong, neutral position throughout the exercise whenever possible.
Ignoring Elbow Discomfort
Mild muscle fatigue is normal, but sharp or persistent elbow discomfort should not be ignored.
Poor form, excessive weight, or inadequate recovery can sometimes contribute to irritation around the elbow joint. This would particularly affect tendons.
If discomfort occurs, reduce the weight and evaluate your technique.
