Lying Prone A
- Músculo objetivo
- —
- Equipamiento
- Body weight
- Parte del cuerpo
- Back
- Tipo
- Strength
The Lying Prone A is a bodyweight floor drill performed face-down with the arms angled outward at roughly 30–45° to form the letter A. It targets the lower trapezius and mid-back postural muscles, making it a staple in rehabilitation programs and corrective routines aimed at improving shoulder health and upper-body posture.
Cómo hacer el Lying Prone A
- 1Lie face-down on a mat with your legs straight and your forehead resting lightly on the floor or a folded towel.
- 2Extend both arms in front of you at roughly 30–45° out from your torso to form the shape of the letter A, with your palms facing inward and thumbs pointing up toward the ceiling.
- 3Relax your neck so it stays in a neutral line with your spine — do not crane your head up.
- 4Take a breath in, then exhale and draw your shoulder blades down and together, engaging your lower trapezius before your arms move.
- 5Keeping your thumbs pointing up, lift both arms off the floor by squeezing through the mid and lower back rather than shrugging your shoulders.
- 6Raise your arms until they are a few inches off the floor and you feel full contraction in your mid-back, then hold for 1–2 seconds.
- 7Lower your arms back to the floor under control, resisting the urge to let them drop.
- 8Reset your shoulder blades and repeat for the desired number of reps.
Consejos de técnica
- Keep your neck long and neutral throughout — your gaze should point straight down at the floor, not forward.
- Initiate every rep by pulling your shoulder blades down and in before you lift; if your arms rise first, the lower traps are not leading the movement.
- Think 'thumbs to the ceiling' rather than 'lift arms' — the external rotation cue keeps the shoulder joint in a safe position.
- Squeeze and hold at the top for a full second to maximize lower-trap activation rather than pulsing through reps quickly.
- Move slowly and deliberately on both the lift and the lower; if you need momentum to raise your arms, reduce the range until your back strength catches up.
Errores comunes
- Shrugging the shoulders up toward the ears instead of drawing the shoulder blades down first, which shifts the work to the upper traps and neck rather than the target lower-trap muscles.
- Craning the head up to look forward during the lift, which compresses the cervical spine and takes the neck out of neutral alignment.
- Letting the elbows bend or the arms drift too wide, which changes the angle and reduces the specific stimulus to the lower trapezius.
- Using a short, bouncy range of motion instead of a controlled lift-and-hold, which relies on momentum rather than genuine muscle contraction.
- Holding the breath or rushing through reps without resetting the shoulder blades between repetitions, which allows form to break down and reduces muscle engagement.
Preguntas frecuentes
What muscles does the Lying Prone A work?
The Lying Prone A primarily targets the lower trapezius and mid-back postural muscles. The rear deltoids and rhomboids assist in stabilizing the shoulder blades during the lift.
What is the difference between Prone A, Y, and W exercises?
Each variation positions the arms at a different angle to bias different parts of the back. The A targets the lower trapezius with arms at roughly 30–45° from the body. The Y raises the arms overhead at about 30° from the midline to bias the mid and lower traps. The W bends the elbows to 90° in a goalpost shape, which emphasizes the rhomboids and mid-trap. All three are commonly combined into a series for comprehensive postural work.
How many reps should I do?
Because this is a postural and motor-control drill, quality matters more than volume. Aim for 2–3 sets of 10–15 slow, controlled reps with a 1–2 second hold at the top. If you cannot hold position at the top, reduce the rep count until your strength improves.
Is the Lying Prone A good for posture?
Yes. Weakness in the lower trapezius is a common contributor to rounded shoulders and poor scapular control. The Lying Prone A directly strengthens that muscle in a pattern that reinforces upright posture, making it useful for desk workers, overhead athletes, and anyone recovering from shoulder impingement.
Can I do this exercise with weights?
Yes. Once you can perform the bodyweight version with strict form and a consistent hold at the top, you can progress by holding a small weight in each hand. Start very light — even 1–2 kg — because the lower trapezius is a small muscle and the leverage at this arm angle is significant.
