# Exercise Ball Serratus Wall Single Leg Slide - Canonical: https://fitwill.app/exercise/10025/exercise-ball-serratus-wall-single-leg-slide/ - Media ID: 10025 - Primary muscle: Shoulders - Body part: Shoulders - Equipment: Stability Ball - Video: https://fitwill.app/videos/10025/exercise-ball-serratus-wall-single-leg-slide.mp4 ## Description The Exercise Ball Serratus Wall Single Leg Slide is a shoulder stability drill that combines an upward wall slide with a balance challenge. You stand on one leg facing a wall, rest your forearm on a stability ball placed against the wall, and slide the ball up the wall in a smooth arc until your arm is nearly overhead, then control it back down. The ball gives your forearm a moving, slightly unstable surface, which forces the muscles around your shoulder blade to stay engaged through the entire path. The star of this movement is the serratus anterior, the fan-shaped muscle on the side of your rib cage that pulls your shoulder blade forward and around your torso. When it works well, your shoulder blade glides cleanly as your arm rises. The lower trapezius assists by guiding the shoulder blade downward and inward as you reach, and the single-leg stance adds demand on your hip stabilizers and deep core to keep your torso from twisting or leaning. This drill is a favorite in shoulder rehab and prehab settings, but it is equally useful for anyone whose shoulders feel pinchy or unstable during pressing, pulling, or overhead work. Overhead athletes such as swimmers, volleyball and baseball players, and CrossFitters often use it to build the upward rotation control that heavy pressing alone does not develop. Because it is done with body weight against a ball, the resistance is modest, so the focus is quality of motion rather than load. Setup matters more than it looks. The ball needs to be at roughly chest to shoulder height against the wall, and your forearm should sit near the center of the ball rather than at its edge. Stand close enough that the ball stays compressed lightly against the wall throughout the slide, but not so close that you can lean your body weight into it. If you drift too far away, the ball will slip sideways; too close, and the wall does the stabilizing for you. Execution should feel like a deliberate reach, not a shove. Press gently into the ball, keep your shoulder blade engaged from the first inch of movement, and let the arm travel up and slightly out along the wall until it lengthens overhead. At the top, a small extra push through the ball is what wakes up the serratus. On the way down, resist gravity instead of letting the ball drop. Common use cases include warming up before upper body training, rebuilding shoulder blade control after periods of pain or inactivity, and pairing with single-leg balance work for a combined core-and-shoulder effect. Keep the reps slow, switch legs halfway through, and stop the set as soon as your balance or shoulder position breaks down. If standing on one leg is too demanding at first, practice the slide on two legs before adding the balance component. ## Instructions 1. Stand facing a wall on one leg, lifting the opposite foot slightly off the floor, with a soft bend in your standing knee. 2. Place a stability ball against the wall at about chest to shoulder height and rest one forearm on top of it, elbow bent roughly 90 degrees. 3. Shift your weight until the ball is lightly compressed between your forearm and the wall, and square your hips and shoulders toward the wall. 4. Brace your midsection and squeeze the glute of the standing leg so your torso stays level and does not rotate as you move. 5. Press gently through your forearm and slide the ball up the wall in a smooth diagonal arc, letting your elbow straighten as it rises. 6. Continue until your arm is nearly overhead and lengthened against the ball, then give a small extra push into the ball to spread your shoulder blade around your rib cage. 7. Pause briefly at the top, then slowly slide the ball back down along the same path, bending the elbow again as it lowers to the starting height. 8. Breathe steadily throughout, exhaling as you slide up and inhaling on the way down. 9. Complete all reps on one arm and leg, then switch sides, or alternate sides each rep if your balance fatigues quickly. 10. Reset your single-leg stance after each rep or two, making sure the lifted foot stays off the floor and your hips stay facing forward. ## Tips & Tricks - Keep the pressure into the ball light and constant. If you lean hard into it, the wall takes over the stabilizing job and the serratus anterior stops doing the work. - The most common mistake is shrugging the working shoulder toward your ear as the arm rises. If you feel tension in your neck, slide the ball a little less far up the wall and focus on keeping the space between your shoulder and ear. - Watch that your hips do not open away from the wall. On the single-leg stance, the lifted leg tends to swing out and rotate your torso; point your hips and chest at the wall for every rep. - If the ball keeps drifting sideways, your forearm is probably sitting too close to the edge of the ball. Re-center it before each set. - Move slowly enough that the whole slide takes two to three seconds up and two to three seconds down. Rushing turns this into a momentum exercise and hides weak points in the range. - A slight outward angle on the slide, so the hand finishes a little wider than the elbow started, usually feels smoother on the shoulder than a straight vertical line. - If your standing leg shakes or your balance breaks before your shoulder tires, hold the wall or a doorway lightly with your free hand until your single-leg control improves. - Do not let the lower back arch and ribs flare at the top of the reach. Keep your front ribs drawn down so the reach comes from the shoulder blade, not from leaning back. - Start with the ball slightly lower than shoulder height if full overhead range feels pinched, and gradually raise the starting position as your control improves. ## Frequently Asked Questions ### Which muscles does the Exercise Ball Serratus Wall Single Leg Slide work? The primary target is the serratus anterior on the side of your rib cage, with the lower trapezius helping guide the shoulder blade. The single-leg stance also recruits your hip stabilizers, glutes, and deep core to keep your torso steady. ### Why is this slide done on one leg instead of standing on both feet? Removing one foot from the floor forces your hips and trunk to stabilize while your arm moves, which trains the shoulder and the balance system at the same time. It turns a simple wall slide into a full-body control drill. ### Can beginners do the Exercise Ball Serratus Wall Single Leg Slide? Yes, but most beginners should first learn the slide standing on both legs. Once you can keep the ball tracking smoothly for ten or more reps, lift one foot and start with shorter sets. ### How high should the stability ball be placed on the wall? Set it around chest to shoulder height so your starting elbow bend is close to 90 degrees. If your overhead range feels restricted, start with the ball slightly lower and progress the height over time. ### Why does my neck tense up when I slide the ball overhead? That usually means your upper trapezius is taking over for the serratus and lower trapezius. Shrug-free cueing helps: keep the space between your shoulder and ear, and shorten the range until you can slide without the shoulder climbing. ### The ball keeps sliding sideways off its path. What should I fix? Check that your forearm sits near the center of the ball and that your shoulders stay square to the wall. Body rotation from the single-leg stance is the most common cause of a wandering ball. ### What can I use instead of a stability ball for this exercise? A plain wall slide with the back of your hand or forearm against the wall is the closest substitute, though you lose the unstable surface. A small towel rolled between your hand and the wall adds a little feedback without the balance challenge of the ball. ### How many reps and sets should I do? Because the load is light, aim for quality: two to three sets of six to ten slow slides per side works well as a warm-up or shoulder prep. Stop the set when your balance wobbles or your shoulder position changes. ### Is it safe to do this drill if my shoulder hurts during pressing? Many people find controlled slides like this more tolerable than pressing, but discomfort during any exercise is a signal to reduce the range or stop. Check with a qualified health professional before training through pain. ### Should I feel this in my standing leg and glute? Yes, some fatigue in the standing hip is expected, since the glute medius is working hard to keep your pelvis level. If your hip gives out before your shoulder, alternate sides each rep or build single-leg balance separately.