# Lying Leg Crossover - Canonical: https://fitwill.app/exercise/8931/lying-leg-crossover/ - Media ID: 8931 - Primary muscle: Hips - Body part: Hips - Equipment: Exercise Mat - Video: https://fitwill.app/videos/8931/lying-leg-crossover.mp4 ## Description The Lying Leg Crossover is a body weight floor exercise performed from a supine position with both legs extended straight up toward the ceiling. From there, you cross one leg over the other in a slow, alternating scissor-like pattern, keeping the legs nearly vertical the entire time. Although the movement looks simple, it places continuous tension on the adductors of the inner thigh while the lower abs and deep core work hard to keep the pelvis stable and the lower back pressed to the floor. This exercise is especially useful for people who want targeted inner thigh work without equipment, as well as anyone building midline control for larger lifts or sports that demand hip stability. Because the legs stay overhead rather than hovering near the floor, it is friendlier to the lower back than many supine leg movements, making it a reasonable option for beginners who find lying leg raises or flutter kicks uncomfortable. The primary muscles at work are the adductor group on the inner thigh, which actively pulls each leg across the midline. The rectus abdominis, particularly its lower fibers, and the transverse abdominis isometrically brace the trunk so the torso does not rock as the legs switch. The hip flexors hold the legs vertical, and a small amount of oblique activity helps control the slight rotational component each cross creates. Setup matters more than it appears to. Lying flat on your back with the arms anchored at your sides gives you a wide, stable base, and pressing the low back down before the first rep protects the spine for everything that follows. If the legs drift toward the head or the pelvis tucks excessively, the adductors stop doing the work and the movement loses its point. Execution should be slow and deliberate. Each cross comes from the hip, not from a swing of the lower leg, and the feet should pass close to one another at the midline with straight knees. Pause briefly at each crossover so the inner thigh does real work rather than relying on momentum, then control the leg back to vertical before switching sides. You will see the Lying Leg Crossover used as a warm-up activation for leg days, as a finishing burnout after squats or adductor work, and as a low-impact core and hip exercise in home and pilates-style routines. Breathe steadily throughout, stop if you feel pinching in the front of the hip or strain in the lower back, and prioritize a smooth rhythm over the number of reps. ## Instructions 1. Lie flat on your back on an exercise mat with your legs together and extended straight up so they are roughly perpendicular to the floor. 2. Place your arms out to your sides at roughly shoulder height with your palms down, and press your lower back gently into the mat. 3. Point your toes toward the ceiling and keep both knees fully straight before starting the first rep. 4. Brace your abdominal muscles as if preparing for a light push to the stomach, keeping your ribcage down. 5. Keeping the knee locked, sweep your right leg across the midline so it crosses over the left leg, letting the feet pass close to each other. 6. Pause for a beat at the crossed position and feel the inner thigh of the crossing leg working. 7. Return the right leg to vertical under control, then sweep the left leg over the right in the same fashion. 8. Continue alternating crossovers for the desired number of reps, moving slowly enough that your torso never rocks side to side. 9. Exhale as each leg crosses over and inhale as it returns to the starting position. 10. When finished, lower both legs together, bending the knees and bringing them toward your chest to reset and release the hips. ## Tips & Tricks - If your hamstrings are tight and your knees bend no matter what, lower the legs slightly away from vertical; a slightly less steep angle lets you keep straight legs, which matters more than the exact angle. - A common mistake is crossing with a big arcing swing instead of a straight pull across the midline; think about drawing the inside of your thigh toward the opposite side of your body. - Watch that the opposite leg does not lean or tilt to meet the crossing leg; both legs should stay independent and vertical except for the leg doing the work. - If your lower back lifts off the mat, narrow the arc of the cross or place a thin pad under the hips; do not continue with a gap under the low back. - Press the palms into the floor through every rep; this anchors the shoulders and stops the upper body from rotating along with the legs. - Slow the tempo down before adding reps; with the legs vertical, gravity does the loading for you, so speed is the only way to cheat this movement. - If you feel a pinch at the front of the hip, reduce the depth of the crossover slightly and check that the pelvis is not rolling toward the crossing side. - Keep the feet relaxed and pointed up rather than tensing the toes; unnecessary lower-leg tension makes it harder to feel the inner thighs driving the cross. - Pair this with a wider hip mobility drill beforehand if your adductors feel grabby; cold, tight inner thighs tend to cramp on the first few crossovers. ## Frequently Asked Questions ### What muscles does the Lying Leg Crossover work? The adductors of the inner thigh are the prime movers, pulling each leg across the midline. The lower abs, deep core, and hip flexors work isometrically to hold the legs vertical and keep the pelvis stable. ### Is the Lying Leg Crossover good for beginners? Yes, it is one of the more accessible supine leg exercises because the legs stay vertical rather than extended over the floor, which keeps the lower back in a safe position. Beginners can start with a shallow cross and a smaller number of slow reps. ### Do I need any equipment for the Lying Leg Crossover? No equipment is required, though an exercise mat is recommended to cushion the spine, shoulders, and arms against the floor. ### Why should my legs stay vertical during the crossover? With the legs perpendicular to the floor, the adductors work against gravity through a controlled arc while the core only has to stabilize, not fight a long lever hanging away from the body. Letting the legs drift lowers the training effect and can pull the lower back off the mat. ### My lower back arches when I cross my legs. What should I change? Re-brace before every rep, press the low back into the mat, and shorten the crossover distance so the pelvis does not tilt. If it still arches, place your hands flat on the floor beside you with firmer downward pressure to lock in the base. ### How is the Lying Leg Crossover different from flutter kicks or scissor kicks? Flutter kicks and scissor kicks move the legs in the vertical plane near the floor, which heavily loads the lower abs and hip flexors. The crossover keeps the legs overhead and moves them across the midline, shifting the emphasis to the inner thighs while the abs stabilize. ### How many reps should I do? Because the load is just your leg weight, higher rep ranges work well; try 20 to 40 total crossovers, alternating sides. Focus on a slow, controlled cross with a brief pause rather than rushing the count. ### Can I make the Lying Leg Crossover harder? Yes. Slow the tempo further, add a two-second pause at every cross, or wear light ankle weights. You can also perform it with the legs slightly lowered from vertical to lengthen the lever, provided the lower back stays glued to the mat. ### What can I substitute if lying down is not an option? Standing hip adduction with a band or cable, seated adductor machine work, or side-lying leg crossovers all hit the inner thighs with a similar crossing action. Choose whichever lets you keep a controlled tempo and pain-free hips. ### Is it safe for people with hip issues? The movement is low impact, but anyone with a history of hip impingement or groin strain should keep the crossover shallow and stop at the first sign of pinching. When in doubt, clear new exercises with a qualified professional.