# Side Lying Windmill - Canonical: https://fitwill.app/exercise/11044/side-lying-windmill/ - Media ID: 11044 - Primary muscle: Chest - Body part: Chest - Equipment: Foam Roll - Video: https://fitwill.app/videos/11044/side-lying-windmill.mp4 ## Description The Side Lying Windmill is a thoracic rotation drill performed on the floor. You lie on your side with your top knee bent and supported on a foam roll, then sweep your top arm up and over your body in a wide arc, like the arm of a windmill, while your eyes follow your hand. It opens the chest, stretches the obliques and pectorals, and frees up rotation through the mid-back. This movement is especially useful for anyone whose upper back has stiffened from long hours of sitting, driving, or pressing work at the desk. Desk workers, overhead athletes like throwers and tennis players, and lifters who bench or press heavily all tend to lose thoracic rotation, and this drill restores it with almost no load on the spine. The main targets are the pectorals and obliques, which lengthen as the arm sweeps open, along with the anterior deltoid and serratus area. Just as important, the position trains the deep core to hold the pelvis and ribs steady while the upper body rotates, which is exactly the split of stability and mobility you need in throwing, swinging, and rotational lifting. The setup matters more than most people expect. The foam roll under the top knee is what pins the pelvis. Without it, the hips twist along with the arm and the rotation happens at the lower back instead of the mid-back, which defeats the purpose. Keep both knees stacked on the roll and let the ribcage, not the pelvis, do the turning. To execute it well, extend both arms straight out from your chest with palms together, hold the bottom arm planted on the floor, and sweep the top arm up toward the ceiling and over toward the opposite side. Move slowly enough that you could stop at any point, breathe out as you open, and pause for a breath or two at the end range before returning along the same path. Use it as a warm-up before upper-body training, as a movement break during the workday, or as part of a cooldown. Eight to ten slow sweeps per side is a practical dose. You should feel a broad stretch across the chest and side of the torso, never a pinch in the shoulder joint or strain in the lower back. ## Instructions 1. Lie on your side on the floor with your legs stacked and your head supported in a neutral position. 2. Bend your top knee to about 90 degrees and rest it on a foam roll placed under the knee so your pelvis stays square to the floor. 3. Extend both arms straight out in front of your chest at shoulder height and press your palms together. 4. Brace your core lightly and keep both knees in contact with the foam roll for the entire set. 5. Keeping the bottom arm planted on the floor, sweep your top arm up toward the ceiling, letting your chest rotate open. 6. Continue the arc until your top hand reaches toward the floor on the opposite side, following your hand with your eyes. 7. Exhale as you open, and hold the end position for one or two breaths, feeling the stretch across your chest and side. 8. Reverse the arc slowly, tracing the same path back until your palms meet again in front of your chest. 9. Complete 8-10 controlled sweeps, then switch sides and repeat with the other knee resting on the foam roll. ## Tips & Tricks - If your knees drift off the foam roll, the rotation is coming from your lower back instead of your mid-back; lighten the range until you can keep the knees pinned. - Do not let the bottom shoulder roll up off the floor; press that arm down gently to anchor the torso as the top arm sweeps. - Lifting the top leg or hip to reach further is the most common cheat; accept a smaller arc rather than twisting from the pelvis. - Keep the movement slow and quiet; if you hear your spine clunking or feel yourself flopping over, add control and shorten the arc. - Let the head travel with the arm rather than twisting the neck first; the eyes lead the hand, which encourages rotation through the thoracic spine. - Hold the open position for a full exhale instead of bouncing; a longer pause at end range does more for the chest and obliques than extra repetitions. - If your shoulder pinches at the top of the arc, bend the sweeping elbow slightly and angle the hand a little higher rather than forcing it flat to the floor. - Place a thin pad or folded towel under your head if lying flat strains your neck; a supported head makes it easier to relax into the rotation. ## Frequently Asked Questions ### What muscles does the Side Lying Windmill work? It primarily stretches the chest and obliques while the anterior deltoid and serratus area assist the arm sweep. The deep core also works to hold the pelvis steady while the upper body rotates. ### Why is the top knee resting on a foam roll? The foam roll anchors the pelvis so the hips cannot twist along with the arm. That forces the rotation to come from the thoracic spine, which is the whole point of the drill. ### Is the Side Lying Windmill suitable for beginners? Yes, it is low load and easy to scale. Beginners should simply reduce the arc and stop at whatever point they can keep both knees glued to the foam roll. ### Should I feel this in my lower back? No, the sensation should sit across the chest and side of the torso. If you feel twisting or strain in the lower back, your pelvis is rotating, so re-check the knee position on the foam roll and shorten the range. ### How many reps should I do per side? Eight to ten slow, controlled sweeps per side works well as a warm-up or cooldown. Quality of the pause at end range matters more than the rep count. ### Can I do the Side Lying Windmill without a foam roll? Yes, a rolled towel, yoga block, or cushion under the top knee works the same way. The key is that the knee is supported so the pelvis stays square. ### Why do my eyes need to follow my hand? Tracking the hand with your eyes encourages the head and ribcage to rotate together, which produces more natural thoracic rotation and keeps the neck from leading the movement. ### When is the best time to use this exercise? It works well before upper-body pressing or throwing sessions to open the chest, and also as a midday movement break if you sit for long stretches. Keep it gentle either way. ### My shoulder pinches when my hand reaches the floor. What should I change? Stop short of the floor or bend the sweeping elbow slightly so the hand angles upward. The arc should challenge the chest stretch, not force the shoulder joint into an uncomfortable position.