Plank leg raises are a bodyweight core exercise that adds a controlled hip extension to a standard plank. They challenge your abs, glutes, shoulders, and back stabilizers at the same time, making them useful for building core control rather than just endurance.
They look simple, but good plank leg raise form matters. If your hips twist, your low back arches, or you rush the movement, the exercise shifts away from the core and can irritate the lower back. Done well, though, it is a strong move for stability, balance, and better full-body control.
What plank leg raises work
Plank leg raises are mainly a stability exercise. They train the core to resist unwanted movement while one leg lifts off the floor. That means your abdominal muscles, especially the deep core, have to stay braced while your glutes lift the leg and your shoulders hold the plank position.
You will also feel work in the obliques, lower back stabilizers, hips, and often the hamstrings of the supporting side. Compared with a basic plank, the leg raise adds more anti-rotation demand, so it is a good progression once you can hold a solid plank without sagging.
How to do plank leg raises correctly
Start in a forearm plank or high plank with your hands or forearms under your shoulders, legs straight, and feet about hip-width apart. Keep your ribs down, squeeze your glutes, and make a straight line from head to heels. Slowly lift one leg a few inches without letting your hips open or shift side to side.
Pause briefly at the top, then lower the leg under control and switch sides. The movement should be small and deliberate. If you cannot keep your spine neutral, raise the leg less or widen your stance. Quality matters more than how high the foot gets.
A helpful cue is: brace first, lift second. If your lower back starts to arch, stop the set or regress to a standard plank until you can maintain control.
Common mistakes and how to fix them
The biggest mistake is letting the hips rotate when the leg lifts. That turns the exercise into a wobbly shift instead of a core stability drill. To fix it, spread your feet a little wider and shorten the range of motion until the torso stays quiet.
Another common error is arching the lower back. This usually means the core is not braced or the glutes are not active enough. Think about drawing your belly button in slightly, squeezing the glutes, and keeping your pelvis neutral. Also avoid holding your breath; steady breathing helps maintain control.
Finally, do not rush through reps. Fast swinging reduces the core challenge and can make the movement less safe. Slow reps with a brief hold are usually more effective.
Variations, programming, and safety
If regular plank leg raises are too hard, start with a standard plank, then try alternating toe taps or short leg lifts from a high plank with the feet wider apart. If they are too easy, slow the tempo, add a longer pause, or perform them from a forearm plank to increase the stability demand.
For programming, 2 to 4 sets of 6 to 10 controlled leg raises per side is a practical starting point for many people. Because this is a stability exercise, stop each set when form breaks rather than chasing fatigue. Quality sets are more useful than high-rep sloppiness.
If you want help checking whether your hips are staying level, a tool like Fitnit can be useful for at-home practice. Its AI form analysis can help spot compensations, and its camera-based rep counting makes it easier to keep track of controlled reps without equipment.
Tips
- Brace your abs before each lift and keep your ribs from flaring.
- Lift the leg only as high as you can without twisting your hips.
- Squeeze the glutes on the working side to reduce low-back compensation.
- Use a wider stance if you feel unstable, then narrow it as you improve.
- Stop the set when your form changes, not when your patience runs out.
Sources
- Exercise: 7 benefits of regular physical activity — Mayo Clinic
- Core Exercises — ACE Fitness
- PubMed — NIH / NCBI
- Physical Activity Guidelines for Americans — U.S. Department of Health and Human Services
Frequently Asked Questions
Are plank leg raises good for abs?
Yes. They train the abs to stabilize the spine while the limbs move, which is a useful form of core strength.
Should I do plank leg raises in a forearm or high plank?
Either works. Forearm planks usually feel harder on the core, while high planks are often easier to set up and control.
Why do my hips twist during plank leg raises?
Usually the stance is too narrow, the core is not braced enough, or the leg is lifting too high. Widen your feet and reduce the range.
How many plank leg raises should I do?
A good start is 2 to 4 sets of 6 to 10 controlled reps per side, but stop sooner if your form breaks.
Ready to Transform Your Fitness Journey?
Track your workouts with AI-powered form analysis, count reps automatically, and achieve your fitness goals with Fitnit.