Single-Arm Linear Jammer — start position
Start
Single-Arm Linear Jammer — end position
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Shoulders / Intermediate / Compound (multi-joint)

Single-Arm Linear Jammer

A barbell exercise for the front delts, with the chest and triceps assisting.

At a glance

Primary
Front delts
Secondary
Chest, Triceps
Equipment
Barbell
Movement pattern
Overhead push
Level
Intermediate
Type
Shoulders, Compound (multi-joint), One side at a time

How to do it

  1. Position a bar into a landmine or securely anchor it in a corner. Load the bar to an appropriate weight.
  2. Raise the bar from the floor, taking it to your shoulders with one or both hands. Adopt a wide stance. This will be your starting position.
  3. Perform the movement by extending the elbow, pressing the weight up. Move explosively, extending the hips and knees fully to produce maximal force.
  4. Return to the starting position.

Common mistakes

  • ✗ Leaning back to press.

    Why it hurts: It turns into an arch that loads the lower back.

    ✓ Instead: Lean slightly forward into the bar and press up and away, ribs down.

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Muscles worked

Neck (Front)Upper traps (Front)Front delts — primary (Front)Side delts (Front)Chest — secondary (Front)Serratus anterior (Front)Biceps (Front)Forearms & grip (Front)Abs (Front)Obliques (Front)Hip flexors (Front)Quads (Front)Adductors (Front)Shins (tibialis) (Front)Calves (Front)Outer shins (peroneals) (Front)Feet (arch & toes) (Front)Neck (Back)Upper traps (Back)Upper back (rhomboids, mid/lower traps) (Back)Rear delts (Back)Side delts (Back)Rotator cuff (Back)Lats (Back)Lower back (erectors) (Back)Triceps — secondary (Back)Forearms & grip (Back)Hip abductors (glute med) (Back)Glutes (Back)Hamstrings (Back)Adductors (Back)Calves (Back)
FrontBack
  • Primary: Front delts
  • Secondary: Chest, Triceps

Best for

How specific this exercise is to each movement.

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Photos and instructions: free-exercise-db (github.com/yuhonas/free-exercise-db), public domain.