# Quadruped Shoulder Cars (Version 2)

- Canonical: https://fitwill.app/exercise/8254/quadruped-shoulder-cars-version-2/
- Media ID: 8254
- Primary muscle: Shoulders
- Body part: Shoulders
- Equipment: Body Weight
- Video: https://fitwill.app/videos/8254/quadruped-shoulder-cars-version-2.mp4

## Description

Quadruped Shoulder Cars (Version 2) is a body weight mobility and control drill performed on all fours, where you lift one hand off the floor and sweep the straight arm through the largest circle your shoulder allows. CAR stands for controlled articular rotation, and the emphasis is exactly what the name suggests: slow, deliberate, full-range circles driven entirely by the working shoulder rather than momentum. The kneeling setup takes the legs and lower body out of the equation, so all of your attention stays on the shoulder joint itself.

This version is especially useful for anyone who wants to maintain or improve overhead shoulder range of motion. Because you are supported by three limbs on the floor, the working arm can travel through a complete 360-degree arc — sweeping forward across the ground, up past your head, and down behind your back — without you having to balance or stand. That makes it a popular warm-up before pressing, pulling, or overhead work, and a practical daily maintenance drill for desk workers whose shoulders feel stiff and restricted.

The exercise primarily trains the deltoids through their full range, but the real work happens in the smaller muscles that steer the humeral head: the rotator cuff group, along with the serratus anterior and the muscles that control the shoulder blade. Your supporting arm, wrist, and trunk also work isometrically, since a stable base is what allows the moving arm to circle freely. Expect the movement to feel much harder on one side than the other if you have a history of shoulder asymmetry.

Setup matters more than it looks. Hands under the shoulders, knees under the hips, a long neutral spine, and a light brace through the trunk create a fixed frame. If your ribs flare or your torso rotates as the arm circles, you are cheating the shoulder out of the very range you are trying to train. Keep the hips square and let the shoulder do the traveling.

To execute the drill well, think of the fingertips drawing the biggest possible arc on an imaginary wall beside you. Move slowly — a full circle should take several seconds in each direction — and pause briefly wherever the shoulder feels sticky or guarded. Complete your reps on one side before switching, and match the work exactly between arms.

Because the load is your own arm and the intent is control rather than fatigue, Quadruped Shoulder Cars (Version 2) is very forgiving and beginner-friendly. Stop short of any position that produces pinching at the front of the shoulder, and shrink the circle rather than forcing through a blocker. Consistent, low-effort daily practice tends to deliver better results than occasional aggressive sessions.

## Instructions

1. Kneel on an exercise mat and set up on all fours with your hands directly under your shoulders and your knees directly under your hips, shins and the tops of your feet resting on the floor.
2. Spread your fingers and press the palm of your working-base hand firmly into the mat, elbows turned slightly so the creases of the arms face forward.
3. Lengthen your spine so your head, mid-back, and pelvis form one long line, then lightly brace your trunk as if bracing for a nudge.
4. Lift one hand off the floor and straighten that arm fully, reaching the fingertips forward as if pointing along the ground.
5. Begin a slow circle: sweep the straight arm forward and across the floor, then up toward the ceiling past your ear, then down behind your hip toward your back, completing the full 360-degree loop.
6. Keep the arm locked straight throughout the circle and let the rotation come from the shoulder joint, deliberately pausing at the tightest points of the arc.
7. Exhale steadily as the arm sweeps upward and inhale as it returns downward, keeping the breath smooth rather than holding it.
8. Finish all your circles in one direction, then reverse and perform the same number counterclockwise before lowering the hand back under the shoulder.
9. Reset your trunk position, confirm your base hand is still pressed into the mat, then switch arms and repeat on the other side for the same number of circles.

## Tips & Tricks

- If your torso twists toward the working side as the arm passes overhead, lighten the effort — the twist usually means you are borrowing range from the spine instead of the shoulder.
- Watch for the supporting arm's elbow bending or the shoulder sagging between the shoulder blades; press the floor away slightly to keep the base side active for the whole set.
- Shrink the circle at any point where you feel a pinch at the front of the moving shoulder, then gradually widen the arc over sessions instead of forcing through it.
- Drive the movement from the shoulder and shoulder blade, not from flicking the wrist — a floppy hand makes the circle sloppy and reduces the rotator cuff demand.
- If your wrist on the base hand aches in the all-fours position, make a fist and support on the knuckles or place the palm on a folded towel to reduce extension.
- A full circle should take roughly five to eight seconds; if you are finishing in two, momentum is doing the work and the joint is not being challenged through its end ranges.
- Expect one side to move noticeably better than the other — match your sets to the stiffer side's circle size rather than letting the mobile arm set the standard.
- Keep the neck long and gaze down at the mat; craning to watch the moving hand encourages the ribs to flare and the trunk to rotate.
- Use this drill as a warm-up before pressing or pulling days, or as a standalone daily practice — going to muscular fatigue defeats the purpose of a control drill.

## Frequently Asked Questions

### What muscles does Quadruped Shoulder Cars (Version 2) work?

The moving shoulder's deltoids and rotator cuff do the driving, with the serratus anterior and mid-trap area stabilizing the shoulder blade through the arc. The supporting arm and trunk work isometrically to hold the all-fours base steady.

### Is Quadruped Shoulder Cars (Version 2) suitable for beginners?

Yes, it is one of the more accessible shoulder mobility drills because the floor supports three of your four limbs and the only load is your own arm. Beginners should simply start with a smaller circle and prioritize slow, quiet control over range.

### Why is the exercise done in a quadruped position instead of standing?

On all fours, your trunk and lower body are fixed, so any rotation or compensation is obvious and easy to prevent. This isolates the shoulder's own range, which is harder to guarantee when standing, where the torso can freely twist to fake extra motion.

### How large should the arm circle be in Quadruped Shoulder Cars (Version 2)?

Aim for the largest circle you can draw with a straight arm while keeping your hips and torso square to the floor. The exact diameter will differ between shoulders and should grow gradually as control improves.

### How many circles should I do per side?

Two to five slow circles in each direction per arm is a common working dose, whether as a warm-up or daily maintenance. Because the intent is control rather than fatigue, quality of the arc matters far more than the rep count.

### My front shoulder pinches when the arm sweeps overhead — should I push through it?

No, a pinch at the front of the shoulder is a signal to reduce the arc, not to force through it. Shrink the circle so the sweep stays comfortable, and if the pinching persists across sessions, have a professional assess the shoulder before continuing.

### What is the most common mistake in this drill?

Rushing the circle and letting the trunk rotate are the two biggest errors — both let you skip the exact end ranges the exercise exists to train. Slow the tempo down and keep the hips pointed straight down at the floor.

### Can I do Quadruped Shoulder Cars (Version 2) if my wrist hurts on the supporting hand?

Yes — support yourself on a closed fist, hold a dumbbell handle for a neutral wrist, or pad the palm with a folded towel. If wrist discomfort continues, address the wrist separately rather than avoiding the drill entirely.

### What can I substitute if kneeling on the floor is uncomfortable?

Any tall-kneeling or standing version of shoulder cars trains a similar arc, and a cushion under the knees makes the quadruped position tolerable for most people. The key is preserving a fixed trunk so the shoulder still has to produce the full rotation on its own.

### Should Quadruped Shoulder Cars (Version 2) be done before or after training?

It works best as a warm-up before pressing, pulling, or overhead training, when you want the shoulders moving through full range under control. Doing it after training is also fine, but avoid turning it into a fatiguing finisher since the drill depends on precise, unhurried movement.