Dumbbell Lying One Arm Supinated Triceps Extension

TricepsDumbbellIntermediate
Lie down on a bench with a dumbbell in one hand. Extend your arm straight up towards the ceiling. Keep your elbow pointing towards the ceiling and lower the dumbbell behind your head. Pause briefly and then return to the starting position by extending your arm back up towards the ceiling. Repeat for desired number of repetitions and then switch to the other arm.

How to perform the Dumbbell Lying One Arm Supinated Triceps Extension

  1. Set up. Set up in a stable, balanced starting position appropriate for the Dumbbell Lying One Arm Supinated Triceps Extension using your dumbbell.
  2. Brace and execute. Brace your core, control the descent, and move through a full pain-free range of motion while emphasizing your triceps.
  3. Reset. Reverse the movement under control and reset between repetitions, keeping your form crisp on every rep.

Coaching cues

  • Move with intent — every rep should feel deliberate, not rushed.
  • Drive force through your triceps rather than momentum.
  • Keep your breathing steady: exhale on the hard part, inhale on the reset.

Common mistakes

  • Using too much weight and losing positional control.
  • Cutting the range of motion short and missing the target muscle.
  • Letting your spine round or hyperextend instead of staying neutral.

Detailed cues, common mistakes, and demonstration video are available in the Fitly app.

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