
Which muscles does it train?
Triceps
Equipment needed
How to perform it
Isolation work is usually trained in a higher rep range: 2 to 4 sets of 10 to 15 reps with 45 to 90 seconds of rest, performed under control.
Execution and technique cues
- Support one hand and knee on a flat bench while keeping the spine in a neutral, horizontal alignment.
- Pull the working upper arm up until it is parallel to the floor and pin the elbow close to the ribs.
- Extend the forearm backward under control until the entire arm forms a straight line.
- Lower the dumbbell slowly until the forearm is at a ninety-degree angle to the upper arm.
Common mistakes
- Swinging the upper arm up and down, which uses shoulder momentum instead of tricep force.
- Using too much weight and using momentum to hurl the dumbbell backward rather than squeezing the muscle.
- Allowing the wrist to flop or bend at the top of the movement instead of keeping it straight.
Frequently asked questions
- Can I perform this exercise standing up without a bench?
- Yes, you can perform it in a hinged standing position by bending at the hips and keeping your back flat.
- Why does the exercise feel easy at the bottom and hard at the top?
- Due to gravity, the torque on the triceps is minimal when the arm is bent and reaches its maximum when the arm is fully extended.
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