Weighted Full Can Exercise exercise animation (Hombre)

Weighted Full Can Exercise

Músculo objetivo
—
Equipamiento
Weighted
Parte del cuerpo
Shoulders
Tipo
Strength

The Weighted Full Can Exercise is a shoulder rehabilitation and strengthening drill performed in the scapular plane, holding a dumbbell with the thumb pointing upward as if gripping a full can. It targets the supraspinatus and the broader rotator cuff musculature, making it a reliable choice for shoulder health maintenance and injury prevention programs.

Cómo hacer el Weighted Full Can Exercise

  1. 1Stand tall with your feet hip-width apart, holding a light dumbbell in one hand with your arm at your side.
  2. 2Rotate your forearm so your thumb points upward, as if you were holding a full can — this is the required grip position throughout the movement.
  3. 3Turn the working arm slightly forward so it is angled approximately 30 degrees in front of the body, placing it in the scapular plane rather than directly to the side.
  4. 4Brace lightly through your core and keep your torso upright; avoid leaning away from the working arm.
  5. 5Raise your arm in the scapular plane in a slow, controlled arc, keeping your elbow straight, until your hand reaches shoulder height.
  6. 6Pause briefly at shoulder height without shrugging or elevating the working shoulder.
  7. 7Lower the arm back to the starting position in a controlled manner, resisting gravity on the way down.
  8. 8Complete all repetitions on one side, then switch arms and repeat.

Consejos de técnica

  • Keep the thumb pointing upward throughout the entire range of motion — rotating the hand inward (empty-can position) shifts load away from the supraspinatus and is a different exercise.
  • Use a very light weight; the supraspinatus is a small muscle and this exercise is not intended for loading heavy.
  • Raise the arm in the scapular plane (about 30 degrees forward of the frontal plane), not directly out to the side — this angle reduces impingement risk and places the supraspinatus in an optimal line of pull.
  • Move slowly and deliberately on both the raising and lowering phases; momentum removes tension from the target muscles.
  • Keep the shoulder blade stable and avoid shrugging at the top — the scapula should not rise toward the ear at full elevation.

Errores comunes

  • Rotating the thumb downward (palm facing the floor) instead of keeping it up — this converts the movement into the empty-can variation, which loads the rotator cuff differently and is associated with greater impingement stress.
  • Lifting the arm directly to the side (frontal plane) rather than in the scapular plane, which reduces supraspinatus activation and can compress structures in the shoulder joint.
  • Using too much weight, which forces other shoulder muscles to compensate and defeats the targeted rehabilitation purpose of the exercise.
  • Shrugging the working shoulder at the top of the movement, which engages the upper trapezius and reduces the isolated demand on the supraspinatus.
  • Raising the arm above shoulder height, which exceeds the functional range intended for this drill and can increase impingement in compromised shoulders.

Preguntas frecuentes

What is the full can exercise and why is it called that?

The full can exercise is a shoulder strengthening drill performed with the thumb pointing upward, mimicking the grip used to hold a full can of liquid. The thumb-up position externally rotates the humerus slightly, which opens the subacromial space and reduces the risk of impingement compared to the thumb-down, or empty-can, variation.

What muscles does the weighted full can exercise work?

The primary target is the supraspinatus, one of the four rotator cuff muscles responsible for initiating shoulder abduction. The surrounding rotator cuff muscles and deltoid also contribute as stabilizers during the movement.

What is the difference between the full can and empty can exercise?

In the full can exercise the thumb points upward throughout the movement; in the empty can variation the thumb points downward as if pouring out a can. Research generally supports the full can as the safer option because the upward thumb position reduces compression of the supraspinatus tendon under the acromion.

How much weight should I use for the full can exercise?

Start with a very light dumbbell — 2 to 5 pounds is appropriate for most people beginning this exercise. Because the supraspinatus is a small rotator cuff muscle, the goal is controlled activation, not heavy loading. Increase weight only when you can complete all repetitions with strict form and no shoulder discomfort.

Can I do the full can exercise if I have a rotator cuff injury?

This exercise is commonly used in rotator cuff rehabilitation, but you should confirm with a physical therapist or sports medicine professional before starting. The appropriate load, range of motion, and progression depend on the severity and nature of the injury.

Ejercicios relacionados