How to Properly Perform One Arm Tricep Dumbbell Extensions for Maximum Muscle Activation
- Jason "Coach" Tate
- Jun 2, 2024
- 2 min read
Updated: Jul 16, 2024

Performing the one-arm tricep dumbbell extension properly is crucial for maximising muscle activation and preventing injury. Here’s a step-by-step guide on how to execute this exercise correctly:
Setup and Starting Position
Choose the Right Weight:
Select a dumbbell that allows you to perform the exercise with proper form for the desired number of repetitions.
Positioning:
Sit on a bench or stand with your feet shoulder-width apart.
Hold a dumbbell in one hand and extend your arm straight overhead. Your palm should be facing forward.
Execution
Engage Your Core:
Keep your core muscles engaged to maintain stability and prevent any arching of your lower back.
Lower the Dumbbell:
Slowly lower the dumbbell behind your head by bending your elbow. Your upper arm should remain stationary, and only your forearm should move. Keep your elbow pointing upwards throughout the movement.
Controlled Movement:
Lower the dumbbell until your forearm is parallel to the floor or you feel a stretch in your triceps. Ensure the movement is slow and controlled to maximize muscle engagement.
Extend the Arm:
Press the dumbbell back up to the starting position by extending your elbow. Focus on squeezing your triceps at the top of the movement for maximum contraction.
Breathing:
Inhale as you lower the dumbbell an
d exhale as you extend your arm back to the starting position.
Tips for Maximum Muscle Activation
Full Range of Motion:
Utilize the full range of motion to fully engage the triceps. Avoid partial reps as they can limit muscle growth.
Elbow Position:
Keep your elbow close to your head to ensure the triceps are doing the work. Avoid flaring your elbow out to the side.
Pace:
Maintain a steady pace. Perform the lowering (eccentric) part of the movement slowly and take about 2-3 seconds, and the lifting (concentric) part should also be controlled but slightly faster.
Avoid Locking Out:
Do not lock out your elbow at the top of the movement to keep constant tension on the triceps.
Alternate Arms:
Perform the exercise with one arm, then switch to the other arm to ensure balanced development.
Common Mistakes to Avoid
Using Too Much Weight:
Using excessively heavy weights can compromise form and increase the risk of injury.
Inadequate Warm-Up:
Always warm up your triceps and shoulders before performing this exercise to prevent strains.
Not Engaging Core:
Failing to engage the core can lead to poor posture and potential back issues.
Rapid Movements:
Avoid performing the exercise too quickly, as this can reduce muscle activation and increase the risk of injury.


