# Seated Internal And External Shoulder Rotation - Canonical: https://fitwill.app/exercise/8724/seated-internal-and-external-shoulder-rotation/ - Media ID: 8724 - Primary muscle: Shoulders - Body part: Shoulders - Equipment: Body Weight - Video: https://fitwill.app/videos/8724/seated-internal-and-external-shoulder-rotation.mp4 ## Description The Seated Internal And External Shoulder Rotation is a bodyweight drill performed sitting upright with the arms lifted into a 90-degree "goalpost" position — elbows bent and held level with the shoulders — before the forearms rotate up toward the ceiling and down toward the floor. Because the elbows stay pinned at shoulder height throughout, the rotation happens almost entirely at the shoulder joint, which places the work directly on the rotator cuff rather than letting the larger muscles of the back and chest take over. The external rotation phase, where the forearms lift toward vertical, mainly challenges the infraspinatus and teres minor at the back of the shoulder, with support from the rear delts and the muscles between the shoulder blades. The internal rotation phase, where the forearms lower toward the floor, shifts the demand toward the subscapularis on the front side of the shoulder blade. Training both directions in one exercise keeps the cuff balanced, which matters because most people's external rotation is comparatively weak from years of pressing, carrying, and desk posture. This version is done seated on the floor, usually cross-legged or with the legs folded comfortably underneath. Sitting removes the option of cheating with the legs and makes it easier to feel whether the torso is staying tall or twisting to help the arms. The setup is popular in warm-ups before pressing or pulling sessions, in rehabilitation-style cuff programs, and as a standalone mobility drill for anyone whose shoulders feel stiff when reaching overhead or behind the back. Execution quality depends on three details: keeping the upper arms parallel to the floor, keeping the elbows bent at a fixed right angle, and moving only the forearms. When those three points hold, the range is surprisingly short — most people rotate the forearms from slightly below the line of the elbows to slightly above it. If you find your elbows drifting forward, your chest opening up, or your head jutting toward the arms, the range has exceeded what the cuff can currently control. Start with no load at all. The rotator cuff muscles are small and respond to precision, not resistance, and the seated position already provides plenty of challenge through postural control. Move slowly, breathe steadily, and treat this as a movement you rehearse rather than a lift you grind through. If either direction causes pinching at the shoulder or pain in the neck, shorten the range or lower the upper arms slightly until the motion is comfortable, and build back up gradually. ## Instructions 1. Sit on the floor with your legs crossed or folded comfortably, sitting tall on your sit bones so your spine is upright without bracing hard. 2. Raise both upper arms out to the sides until they are parallel to the floor, then bend the elbows to 90 degrees so the forearms point forward and the fingertips face ahead of you. 3. Draw your shoulder blades gently back and down, and keep your neck long — avoid letting the shoulders shrug up toward the ears. 4. Brace the torso lightly to keep the ribcage stacked over the pelvis; this trunk position stays fixed for the whole set. 5. Exhale as you rotate the forearms upward, pivoting at the shoulder until the fingertips point toward the ceiling and the backs of the hands nearly meet overhead. 6. Pause briefly at the top, then inhale as you reverse the rotation, lowering the forearms past the starting line until the fingertips point toward the floor. 7. Keep the elbows locked at shoulder height and at a right angle for every rep — if an elbow drops or drifts forward, shorten the range. 8. Move through the full up-and-down cycle for the desired number of slow repetitions, then rest before the next set. 9. If one direction is much harder than the other, add a few extra controlled reps on the weaker side to bring it closer to balance. ## Tips & Tricks - Think of the elbows as hinges screwed to a wall at shoulder height — the forearms swing like doors. Most errors come from the elbow joint itself moving instead of the shoulder rotating. - If your forearms cannot reach vertical at the top, do not force it; limited external rotation is common and improves with consistent practice at your current end range. - A frequent mistake is the head pushing forward between the arms at the top of the rotation. Keep the back of the neck long and the ears in line with the shoulders. - Watch for the lower back arching as the arms fatigue — the seated position hides this well, so occasionally check that your ribs are not flaring upward. - Slow the lowering half of each rep to two or three seconds. The descent from forearms-up is where the cuff muscles work hardest under control. - If sitting on the floor bothers your hips or knees, sit on the edge of a firm cushion or low bench instead; just keep the torso equally tall. - Warm the shoulders first with a few easy arm circles, since rotating cold through the goalpost position can feel tight even when the shoulder is healthy. - Stop the internal rotation phase at any point where the front of the shoulder pinches — rotating to the floor is a range goal, not a requirement for every body. ## Frequently Asked Questions ### What muscles does the Seated Internal And External Shoulder Rotation work? It primarily targets the rotator cuff — the infraspinatus and teres minor on external rotation and the subscapularis on internal rotation — with support from the rear and middle delts and the muscles of the upper back that stabilize the shoulder blades. ### Is this exercise suitable for beginners? Yes, and it is often a good first shoulder drill because the seated, unloaded position makes it easy to learn control. Beginners should use a short, comfortable range and prioritize keeping the elbows at shoulder height over reaching full rotation. ### Why do my elbows keep dropping during the movement? Dropping elbows usually mean the rotator cuff and upper back are tiring, or the range is too large for current control. Reduce the speed, shorten the arc, and rest more between sets until the 90-degree elbow position holds throughout. ### Should I hold a weight or resistance band in this exercise? Master the bodyweight version first. The seated goalpost position already challenges the cuff through postural control, and adding load before the movement is precise tends to shift work to the larger shoulder muscles. ### Can I do the Seated Internal And External Shoulder Rotation every day? Because it uses no external load and small ranges, many people tolerate it as a daily warm-up or desk-break drill. If the shoulders feel sore rather than simply worked, take a day off and reduce the volume. ### My forearms cannot point straight up at the top — is that a problem? Not necessarily. Limited external rotation is very common, and the fix is practicing consistently within your available range rather than forcing the end position, which can strain the shoulder capsule. ### What can I use instead if sitting on the floor is uncomfortable? Sit on a low bench, firm cushion, or the edge of a chair with the feet flat, keeping the same upright torso and goalpost arm position — the rotation mechanics stay identical. ### When should I do this exercise in my workout? It works best as a warm-up before pressing or overhead movements, or as a dedicated cuff-strengthening block at the start of a session when the shoulders are fresh. ### Is it normal to feel this between the shoulder blades rather than in the shoulders? Some upper-back sensation is expected because the blade-stabilizing muscles hold the goalpost position. If the upper back dominates completely, ease off the blade squeeze and let the rotation itself do more of the work. ### When should I be cautious with this movement? If you have a current shoulder injury, recent dislocation, or sharp pinching during either rotation, shorten the range or consult a qualified professional before continuing. Mild muscular effort is normal; joint pain is not.