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Lying Dumbbell Alternate Extension

A lying triceps extension performed one arm at a time in alternation, letting each side work through a full stretch while the resting arm stabilizes.

ArmsDumbbellElbow extension
GoLightWeight mediadumbbell-lying-alternate-extension

Demonstration coming soon

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Primary

Triceps

Secondary

AnconeusForearm flexorsCore

Equipment

Dumbbell

Pattern

Elbow extension

Setup

  1. 01Lie flat on a bench with a dumbbell in each hand.
  2. 02Press both dumbbells up over the shoulders with neutral grips.
  3. 03Plant the feet and keep the ribs down.
  4. 04Set both upper arms vertical and steady.

Execution

  1. 01Bend one elbow to lower that dumbbell beside your head.
  2. 02Keep the working upper arm vertical as the forearm hinges.
  3. 03Extend the elbow back to lockout over the shoulder.
  4. 04Alternate arms rep for rep while the other arm holds at the top.

Checkpoints

  • -The non-working arm stays locked out and still overhead.
  • -Only the forearm of the working arm moves.
  • -The dumbbell lowers beside the head, never over the face.
  • -Both sides move with matching tempo and depth.

Common mistakes

  • -Letting the resting arm drift or bend while it waits.
  • -Moving the working shoulder instead of just the elbow.
  • -Rushing the alternation and losing eccentric control.
  • -Flaring the working elbow wide.

Programming notes

  • -Use 3 sets of 8 to 12 reps per arm.
  • -The overhead isometric hold makes lighter dumbbells feel demanding.
  • -Alternate starting arm between sets to balance fatigue.

Related exercises

Lying Dumbbell Triceps Extension

Dumbbell / Arms

Lying Dumbbell Single Extension

Dumbbell / Arms

Lying One-Arm Dumbbell Pronated Triceps Extension

Dumbbell / Arms

Dumbbell Skull Crusher

Dumbbell / Arms

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