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Smith Machine JM Press

Smith Machine JM Press demonstration

Category

compound

Difficulty

advanced

Equipment

smith machine, bench

Force Type

push

How to Perform the Smith Machine JM Press

  1. Set up a flat bench under the Smith Machine and lie down with your eyes directly under the bar.
  2. Grip the bar with a shoulder-width or slightly narrower grip and unrack it with arms fully extended.
  3. Begin lowering the bar by simultaneously bending your elbows and allowing them to drift forward toward your face.
  4. Lower the bar toward your chin or upper chest area, keeping your elbows at roughly a 45-degree angle to your torso.
  5. Stop when the bar is a few inches above your chin and your forearms are roughly at 90 degrees or slightly less.
  6. Reverse the motion by pressing the bar upward and slightly back, extending your elbows fully to lockout.
  7. Focus on feeling the triceps work throughout the entire range of motion.

Common Mistakes to Avoid

Lowering the bar too far toward the forehead like a skull crusher

The bar should lower toward your chin or upper chest, not your forehead; the JM press has a different bar path than a skull crusher.

Flaring the elbows too wide

Keep your elbows at approximately 45 degrees to your torso to maintain triceps emphasis and protect the shoulders.

Using too much weight before mastering the movement pattern

Start light and focus on the unique bar path; the JM press requires practice to coordinate the combined press and extension.

Muscles Worked

Benefits

  • Overloads the triceps more than traditional skull crushers due to the combined press and extension
  • Builds triceps strength that directly transfers to bench press lockout
  • The Smith Machine makes this advanced movement more accessible and safer

Pro Tips

  • Think of the movement as lowering the bar to your chin while keeping your elbows pointing forward.
  • The Smith Machine is ideal for learning this exercise since the fixed path lets you focus on the unique elbow mechanics.
  • Pause briefly at the bottom to eliminate momentum and ensure the triceps are fully loaded.

Variations

Recommended Sets & Reps

Strength

4-5 sets of 4-6 reps

Hypertrophy

3-4 sets of 8-12 reps

Endurance

2-3 sets of 12-15 reps

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