# 90 To 90 Switch - Canonical: https://fitwill.app/exercise/8543/90-to-90-switch/ - Media ID: 8543 - Primary muscle: Hips - Body part: Hips - Equipment: Body Weight - Video: https://fitwill.app/videos/8543/90-to-90-switch.mp4 ## Description The 90 To 90 Switch is a seated hip mobility drill that takes your hips through both external and internal rotation in one continuous movement. You start sitting on the floor with your front leg bent to roughly 90 degrees in front of you and your rear leg bent to roughly 90 degrees out to the side, then rotate your knees from one side to the other without letting your hands touch the floor. The name comes from those two right-angle positions your legs form at each end of the switch. This drill is one of the most efficient ways to assess and improve hip rotation. Many people lose internal rotation from long hours of sitting, and that loss shows up as stiff squats, pinching during lunges, or compensations in running and changing direction. By moving directly from one 90/90 position to its mirror image, you train external rotation on the front hip and internal rotation on the back hip at the same time, then reverse the demand with every switch. Because your hands stay off the ground, your trunk has to stay organized while your legs travel across the floor. That quiet core demand is why the abdominals light up in this drill even though it is fundamentally a hip movement. The adductors and glutes work to control the legs as they sweep across, and the deep rotators of the hip get loaded through a full range rather than held in a static stretch. Setup matters more than speed here. Sit tall on your sit bones rather than slumping back onto your tailbone, because a rounded pelvis changes the angle your hips can rotate through and makes the switch feel far tighter than it should. Keep both knees bent at true right angles and both feet relaxed as the knees travel. Rushing the switch and falling from one side into the other defeats the purpose; the value comes from controlling the middle of the transition, where your hips are in a neutral between rotations. The 90 To 90 Switch fits well into warm-ups before squats, deadlifts, or any field sport, and it also works as a standalone daily mobility practice. People with generally healthy hips can usually train it directly, while anyone with a history of hip injury or a recent hip replacement should clear it with a qualified professional first. Expect one side to move noticeably better than the other; that asymmetry is exactly the information this drill is designed to reveal. ## Instructions 1. Sit on an exercise mat with your torso upright and your hands resting lightly at your chest or hovering at your sides. 2. Place your right leg in front of you with the knee bent to 90 degrees, shin crossing in front of your body, and your left leg out to the side with the knee bent to 90 degrees, shin running behind you. 3. Settle your weight evenly onto both sit bones and brace your abdomen lightly so your ribs stay stacked over your pelvis. 4. Lift both knees slightly off the floor and rotate them together toward the left, pivoting on your sit bones. 5. Keep the movement controlled through the middle, when both knees point forward and your thighs are roughly parallel to each other. 6. Finish on the left side with your left knee bent 90 degrees in front and your right knee bent 90 degrees out to the side, mirroring your starting position. 7. Pause briefly, keeping your chest tall and both feet relaxed. 8. Switch back to the right side with the same controlled rotation, completing one repetition. 9. Breathe steadily throughout, exhaling as the knees travel across and inhaling as you settle into each side. 10. Complete 8 to 10 switches per set, then check whether one side feels tighter or slower than the other. ## Tips & Tricks - Sit on a folded towel or low cushion if your lower back rounds and you slump backward; elevating the hips a little usually restores a tall torso instantly. - The hardest part of the switch is the moment both knees face forward. Slow down through that middle zone instead of letting gravity drop you into the next side. - If your hands creep down toward the floor for support, you are losing the trunk challenge. Keep them at chest height, even if the switch gets smaller. - Do not force the front knee toward the ground. A front shin that stays parallel to your chest is enough; pressing the knee down often just tilts the pelvis. - Watch for your weight shifting onto one cheek during the switch. Staying centered over both sit bones keeps the rotation happening at the hips rather than the spine. - If the rear leg cramps in the hamstring or inner thigh, shorten the angle slightly and rebuild up to a true 90-degree position over several sessions. - Switching in one direction only is a common habit. Always return to the starting side so you train rotation both ways equally. - Tight hips often benefit from a few slow switches before a squat or hinge session, but avoid bouncing or cranking at the end range. ## Frequently Asked Questions ### What muscles and joints does the 90 To 90 Switch work? It primarily trains the deep rotators of the hips, combining external rotation on the front leg and internal rotation on the back leg. The glutes, adductors, and abdominals work to control the legs and keep your torso steady during the switch. ### Why are my legs bent at 90 degrees in the 90 To 90 Switch? The right-angle bend at the hip and knee puts the thigh bone in a neutral position so rotation comes from the hip joint itself rather than from twisting the knee or spine. It also gives you a consistent reference point so you can track progress on each side. ### Is the 90 To 90 Switch suitable for beginners? Yes, most beginners can perform it, though many will find the range short at first. Reduce the angle of the knees, elevate your hips on a cushion, and move only through the range you can control while keeping your chest tall. ### Why can I switch to one side easily but not the other? Side-to-side differences in hip internal or external rotation are extremely common, especially in people who favor one leg in sport or sit asymmetrically. The tighter direction needs slower, more deliberate switches rather than more force. ### Should my hands touch the floor during the 90 To 90 Switch? Ideally no. Keeping your hands at chest level forces your hips and trunk to do the work, which is the point of the drill. If you need support at first, use fingertips lightly until you can lift them away. ### When should I do the 90 To 90 Switch, before or after training? It works well as part of a warm-up before squats, deadlifts, lunges, or running, and it can also be done on its own as daily hip mobility practice. Move slowly and avoid using it as an aggressive end-range stretch right before heavy lifting. ### My lower back aches when I do the 90 To 90 Switch. What should I change? Aching is usually a sign your pelvis is rounding back as you rotate. Sit up taller, elevate your hips on a low cushion, and make the switch smaller until your trunk stays upright through the whole movement. ### What can I substitute if the 90 To 90 Switch is too uncomfortable? Try a seated hip internal and external rotation drill with your legs relaxed, or perform the same rotation lying on your back with knees bent. Both options train similar hip ranges with less compression on the knees and lower back. ### Can the 90 To 90 Switch hurt my knees? The rotation should happen at the hips, not the knees, so if you feel knee discomfort, stop and check your setup. Make sure your weight stays over the knee rather than pulling the foot across, and reduce the range until only the hips are working.