Exercise guide
Plank Shoulder Tap
- Intermediate
- Compound
- Timed hold
- Lower arms
- Lower legs
- Shoulders
- Upper arms
- Upper legs
- Waist
This anti-rotational core exercise builds exceptional stability in the obliques and transverse abdominis while improving shoulder health and scapular control. It challenges the body to maintain a rigid torso against a shifting center of gravity as you move from four points of contact to three.
Reviewed by the Crucible Fit team · Updated June 2026
Muscles worked
Setup
- Begin in a high plank position with your hands directly under your shoulders and your body in a straight line from head to heels.
- Position your feet slightly wider than hip-width apart to create a stable base and prevent hip rotation.
- Engage your glutes and pull your belly button toward your spine to lock your pelvis in place.
How to do it
- Shift your weight slightly onto your left hand and lift your right hand to tap your left shoulder, exhaling as you move.
- Lower your right hand back to the starting position with control, inhaling as you reset.
- Repeat the movement by lifting your left hand to tap your right shoulder, alternating sides for the duration of the set.
- Maintain a slow, controlled tempo, focusing on keeping your hips perfectly level throughout the transition.
Form checklist
- Keep your hips square to the floor; do not let them rock or tilt side-to-side.
- Maintain a neutral neck by looking at a spot on the floor about 6 inches in front of your hands.
- Avoid shrugging; keep your shoulders pulled away from your ears.
- Ensure your hands remain directly under your shoulders to protect the joint.
Pro tips
- Imagine there is a glass of water resting on your lower back that you cannot spill; this mental cue helps eliminate hip sway.
- Actively push the floor away with your grounded hand to engage the serratus anterior and stabilize the shoulder blade.
Make it harder
- Bring your feet closer together or touch them to reduce your base of support and increase the stability demand.
- Perform the tap with a 3-second hold at the shoulder to maximize time under tension for the core.
Frequently asked
- What muscles does the plank shoulder tap work?
- The plank shoulder tap primarily targets the abs, deltoids, and obliques, and also works the adductors, hamstrings, and quadriceps as secondary muscles.
- What equipment do you need for the plank shoulder tap?
- The plank shoulder tap requires no equipment — just your body weight.
- Is the plank shoulder tap good for beginners?
- The plank shoulder tap is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.