# Overhead Knee Raise - Canonical: https://fitwill.app/exercise/8784/overhead-knee-raise/ - Media ID: 8784 - Primary muscle: Abs - Body part: Core - Equipment: Body Weight - Video: https://fitwill.app/videos/8784/overhead-knee-raise.mp4 ## Description The Overhead Knee Raise is a standing bodyweight core exercise performed with both arms extended straight overhead. From that tall position, you lift one knee up toward your chest in a controlled motion, lower it back down, and repeat on the other side. Raising the arms overhead changes this from a simple standing knee lift into a genuine trunk challenge, because it lengthens the torso, shifts your center of gravity upward, and removes the counterbalance your arms would normally provide. The main work is done by the abdominal wall, especially the lower portion of the rectus abdominis, which pulls the pelvis and ribcage toward each other as the knee rises. The hip flexors, led by the iliopsoas, drive the thigh upward, while the deep core and obliques work continuously to stop your torso from swaying or leaning away from the lifting leg. The shoulders and upper back also stay busy holding the arms locked out overhead for the entire set. This movement suits a wide range of trainees. Beginners can use it to learn how to brace and control the trunk without getting on the floor, and more advanced lifters use it as a warm-up activation, a balance and stability drill, or higher-rep conditioning between heavier exercises. It is also a practical option when you have no equipment and no space to lie down. Setup matters more than it looks. Stand tall with feet about hip-width apart, arms fully extended overhead with elbows locked and biceps near the ears. Before each rep, brace the abdominals as if bracing for a light push. If you start the set loose, the knee raise will simply arch your lower back and tilt your pelvis forward instead of training the abs. To execute it well, shift your weight slightly into the standing leg, exhale, and drive one knee up to at least hip height while your torso stays vertical and your arms stay still overhead. Pause briefly at the top, then lower the foot back to the floor under control before switching sides. The knee should travel straight up in front of you rather than swinging out to the side. The most common fault is leaning the torso back as the knee rises, which turns the exercise into a hip flexor swing and strains the lower back. Keep the ribs pulled down, the glutes of the standing leg engaged, and accept a shorter knee height if that is what it takes to stay upright. Move smoothly and deliberately; this is a control exercise, not a marching drill. ## Instructions 1. Stand upright with your feet hip-width apart and your weight spread evenly across both feet. 2. Extend both arms straight overhead so the elbows are locked and your hands point toward the ceiling, keeping your biceps close to your ears. 3. Brace your abdominal wall and gently draw your ribs down so your lower back is not already arched before you move. 4. Shift slightly more of your weight into one leg to create a stable base. 5. Exhale and drive your opposite knee up in front of you until the thigh reaches at least hip height, keeping your torso vertical and your arms frozen in place overhead. 6. Pause for a beat at the top and squeeze your lower abdominals rather than just letting the hip flexors do the lifting. 7. Inhale as you lower the foot back to the floor with control, resisting the urge to drop it. 8. Reset your brace, then repeat with the other knee. 9. Continue alternating sides for the desired number of reps, keeping each rep at the same height and tempo. 10. Stop the set as soon as you notice your torso leaning back or your knee height dropping. ## Tips & Tricks - If you keep leaning backward as the knee rises, stand a few inches from a wall with your back close to it; the wall gives instant feedback when your hips drift back. - Think about pulling your knee up with the lower abs rather than swinging the thigh, which keeps the hip flexors from dominating the movement. - Keep the arms rigid and still overhead throughout. If your hands drift forward or your elbows bend, your trunk is rotating to compensate. - A lower knee height with a vertical torso beats a high knee with an arched back. Reduce the range before you reduce your form standards. - Squeeze the glute of your standing leg during each rep; this stabilizes the pelvis and makes it much easier to stay tall. - Avoid rushing the alternation. A fast marching rhythm turns this into a balance drill with very little abdominal work. - If your shoulders tire before your abs, lower the arms slightly forward to about ear height, which is easier on the shoulders while still removing arm counterbalance. - Keep the lifted foot relaxed and the knee pointing straight ahead; letting the knee drift outward usually signals a rotating pelvis. - Press the feet firmly into the floor and imagine growing taller through the fingertips as the knee rises; this cue helps prevent spinal collapse. ## Frequently Asked Questions ### What muscles does the Overhead Knee Raise work? The lower abs and hip flexors do the primary work of lifting the knee, while the deep core and obliques stabilize the trunk. The shoulders and upper back hold the arms overhead isometrically for the whole set. ### Why are the arms overhead instead of down at my sides? Raising the arms lengthens the torso and lifts your center of gravity, so the core has to work harder to keep you upright as the knee lifts. It also removes the counterbalance your arms would normally give you. ### Is the Overhead Knee Raise good for beginners? Yes. It requires no equipment, is easy to scale by lowering the knee height, and teaches bracing and single-leg balance. Beginners who struggle to stay upright can start with arms at shoulder height and progress overhead. ### How high should I raise my knee during the Overhead Knee Raise? Aim for at least hip height, but only as high as you can go while your torso stays vertical and your arms stay still overhead. Losing your upright position to gain height defeats the purpose of the exercise. ### Why does my lower back feel strained when I lift my knee? This usually means your torso is arching and leaning backward as the thigh rises, letting the hip flexors pull on the lumbar spine. Brace harder, pull the ribs down, squeeze the standing-leg glute, and use a shorter range. ### Can I use the Overhead Knee Raise as a warm-up? Absolutely. A set of slow alternating reps activates the abdominals, hip flexors, and stabilizers before squats, running, or any standing lower-body work. Keep the tempo controlled and the reps moderate. ### What can I substitute if standing balance is too difficult? Perform the same knee raise with your fingertips lightly touching a wall, a squat rack, or the back of a chair. As your balance improves, reduce the support until you can do the full movement freestanding. ### Should I hold my breath during the Overhead Knee Raise? No. Exhale as the knee rises to help the abdominals contract, and inhale as you lower the foot. Continuous, steady breathing keeps the movement smooth and the trunk braced without excess tension. ### How many reps should I do? For core endurance and stability, 10 to 20 slow alternating reps per side works well. Stop the set when your knee height drops or you start leaning back, since those changes shift the work away from the abs.