# Side Lying Hip Internal External Rotation - Canonical: https://fitwill.app/exercise/8493/side-lying-hip-internal-external-rotation/ - Media ID: 8493 - Primary muscle: Glutes - Body part: Hips - Equipment: Exercise Mat - Video: https://fitwill.app/videos/8493/side-lying-hip-internal-external-rotation.mp4 ## Description The Side Lying Hip Internal External Rotation is a low-load mobility and activation drill performed on your side with the knees bent roughly 90 degrees. From this stacked position, you rotate the top hip in both directions: opening the knee toward the ceiling works external rotation, while lifting the foot with the knee staying planted works internal rotation. Because the floor supports your trunk and bottom leg, you can isolate the rotators of the hip without the balance demands or spinal loading of standing rotation drills. This exercise is especially useful for people whose hips feel stiff after long periods of sitting, runners and lifters who want healthy hip rotation for squats and single-leg work, and anyone rebuilding control after time away from training. Deep hip rotators like the gluteus medius, the posterior fibers of the gluteus maximus, and the tensor fasciae latae all contribute, depending on which direction you are rotating. The slow, deliberate tempo also teaches you to feel the difference between rotating at the hip and cheating by rolling the pelvis or lower back. The setup matters more here than in most body weight drills. Your knees should stay bent at a fixed angle and stacked in front of your torso, your head supported by your bottom arm, and your pelvis neither tilted forward nor tucked under. If the pelvis rocks backward as the knee opens, the lumbar spine is doing the work the hip should be doing, and the training effect drops sharply. Keeping a small pillow or towel under the head and the back straight along an imaginary wall line makes the drill far more honest. To execute the movement well, think of the hip joint as a hinge that spins in place. For external rotation, keep the feet together and lift only the top knee as far as it goes without the pelvis moving. For internal rotation, keep the top knee touching the bottom knee and lift the top foot toward the ceiling. Both halves should feel smooth and equally controlled; most people discover one direction is noticeably stiffer, which is normal and exactly the info you want. Practically, this drill fits well as a warm-up before lower body strength sessions, as standalone work on recovery days, or as part of a hip health routine alongside clamshells and side-lying abductions. Two or three sets of eight to twelve slow repetitions per direction per side is a solid starting dose. Move with intention rather than chasing range, and let the range improve over weeks, not within a single session. ## Instructions 1. Lie on your side on an exercise mat with your legs stacked and knees bent about 90 degrees, and rest your head on your bottom arm or a small towel. 2. Place your top hand on the floor in front of your ribs for light support, and bring both knees forward so they sit in line with your shoulders and hips. 3. Gently brace your abdominal muscles and check that your pelvis is level, with your back neither arched nor rounded. 4. For external rotation, keep your feet touching and slowly raise the top knee toward the ceiling, hinging only at the hip. 5. Pause briefly at the top of the knee lift, making sure your torso and pelvis have not rolled backward. 6. Lower the knee back down with control until it lightly touches the bottom knee. 7. For internal rotation, hold the knees together and slowly lift the top foot toward the ceiling while the top knee stays in contact with the bottom knee. 8. Lower the foot back down under control, then continue alternating between the two rotation directions if your routine calls for both. 9. Exhale as you rotate up, inhale as you return, and complete all repetitions on one side before rolling over and repeating on the other side. ## Tips & Tricks - If your knee cannot reach very far in either direction, do not force it; the knee angle at 90 degrees puts the hip in a spot where stiffness shows up fast, and small controlled arcs still train the rotators. - A common mistake is rolling the whole torso backward as the top knee lifts. Watch that your top shoulder stays stacked over the bottom shoulder throughout the set. - Keep the feet in light contact during the external rotation half; once the feet separate, the glutes and lower back start compensating for the hip. - If your bottom hip gets sore from lying on the mat, place a folded towel between your waist and the floor to level the pelvis. - Slow the tempo down rather than adding reps. Two seconds up and two seconds down exposes hip stiffness far better than fast swinging. - Do not let the top hip hike up toward your ribs during internal rotation; the foot should lift because the hip spins, not because the pelvis lifts. - Expect one side to rotate further than the other. Note the difference and give the stiffer side one extra set rather than rushing the tight side. - If you feel pinching at the front of the hip, reduce the knee bend slightly or rotate within a smaller arc before working back to 90 degrees. ## Frequently Asked Questions ### Which muscles does the Side Lying Hip Internal External Rotation work? It primarily targets the deep hip rotators, including the gluteus medius and the posterior fibers of the gluteus maximus for external rotation, with the tensor fasciae latae and adductors assisting internal rotation and control. ### Should my knees stay bent at 90 degrees during the Side Lying Hip Internal External Rotation? That is the standard angle, and it challenges the rotators at a mid-range hip position. If 90 degrees feels pinched or uncomfortable, use a shallower knee bend and progress gradually. ### Can beginners do the Side Lying Hip Internal External Rotation? Yes, it is one of the most beginner-friendly hip drills because the floor stabilizes your trunk and there is no load. Start with slow reps through a comfortable arc and build range over time. ### Why do my hips roll backward when I lift my top knee? Rolling usually means the hip has reached the end of its rotation range and the pelvis is compensating. Reduce the height of the knee lift until you can move without the torso following. ### Is it normal for one direction of rotation to feel tighter? Most people find external rotation or internal rotation stiffer on one or both sides. Train both directions evenly and let the tight side catch up instead of only working the easy direction. ### How is this different from a clamshell? A clamshell only opens the knee, training one direction of hip rotation. The Side Lying Hip Internal External Rotation adds the internal rotation half, where the foot lifts while the knees stay together, giving you both directions in one setup. ### Do I need any equipment for this exercise? No, just an exercise mat or a soft floor surface to cushion your hip and support your head. A small towel under the head improves comfort but is optional. ### How many sets and reps should I do of the Side Lying Hip Internal External Rotation? Two to three sets of 8 to 12 slow repetitions per direction per side works well, either as a warm-up before leg training or on its own during recovery days. ### Is it safe to do this exercise if my hips click or pop? Occasional painless clicking is common during hip rotation and is not usually a concern, but skip the drill and consult a professional if the movement causes pain, sharp pinching, or symptoms that linger afterward.