Leg raises are a simple bodyweight exercise commonly used to strengthen the abdominal muscles, hip flexors, and overall core. They can be performed on the floor, from a bench, or while hanging from a bar, making them suitable for different fitness levels. Although the movement looks straightforward, good technique is important for protecting the lower back and getting the intended muscles involved.
Many people add leg raises to their workout because they require little equipment and can be progressed gradually. The exercise challenges your ability to control the pelvis and trunk while moving the legs, which makes it useful for building core stability as well as strength. Different variations can increase or decrease the difficulty depending on your experience.
However, leg raises are not simply about lifting your feet as high as possible. Rushing the movement, arching the lower back, or relying too heavily on momentum can reduce effectiveness and create discomfort. Learning proper form, appropriate progressions, and sensible training volume can help you use leg raises more safely and effectively.
What Are Leg Raises?
Leg raises are exercises in which you lift one or both legs while keeping the upper body relatively stable. The most common version is performed while lying on your back with the legs extended and raised toward the ceiling. The legs are then lowered under control without allowing the lower back to excessively arch away from the floor.
The exercise can also be performed with bent knees, which reduces the lever length and usually makes the movement easier. More advanced versions include hanging leg raises, captain’s chair raises, and straight-leg lifts from a bench. Each variation changes how much resistance the abdominal and hip muscles must control.
Although leg raises are often described as a lower-ab exercise, the abdominal muscles work as part of an integrated core system rather than in isolated sections. The movement also requires significant help from the hip flexors. Understanding this shared workload helps explain why form and pelvic position are important throughout every repetition.
What Muscles Do Leg Raises Work?
The rectus abdominis is one of the main abdominal muscles involved in leg raises. It helps control the position of the pelvis and prevents excessive extension through the lower back as the legs move. The deeper abdominal muscles also contribute by stabilizing the trunk and maintaining pressure through the core.
The hip flexors play an important role because they lift the thighs toward the torso. These include muscles such as the iliopsoas and rectus femoris. Because the hip flexors can be strong and dominant, the abdominal muscles must work effectively to keep the pelvis controlled while the legs are raised and lowered.
Other muscles contribute depending on the variation. The quadriceps help keep the knees extended during straight-leg versions, while the glutes and surrounding hip muscles provide additional stability. Exercises such as abductor exercises can complement leg raises by strengthening other muscles that help control the hips and pelvis.
How to Do Lying Leg Raises Correctly
Begin by lying on your back with your legs extended and your arms resting beside your body. You can place your hands under your hips if that position feels more comfortable, but avoid using the arms to create excessive support. Gently brace your abdominal muscles and keep your head relaxed on the floor.
Raise both legs slowly while keeping them together and as straight as your mobility allows. Continue until they approach a vertical position or until you reach a comfortable range. Avoid swinging the legs or lifting them so quickly that momentum replaces muscular control.
Lower your legs slowly while maintaining tension through the core. Stop before your lower back begins to lift significantly away from the floor, then raise the legs again. The ideal range is the one you can control rather than the lowest possible position regardless of technique.
Benefits of Leg Raises
Leg raises can improve core strength by challenging the abdominal muscles to stabilize the pelvis while the legs move. This type of control is useful during many everyday and athletic activities. A stronger core can help create a more stable connection between the upper and lower body during movement.
The exercise also develops hip flexor strength and endurance. Strong hip flexors contribute to walking, running, stair climbing, and movements that involve lifting the knees. However, balanced training is important because the hip flexors should work alongside the glutes, abdominal muscles, and other muscles surrounding the pelvis.
Another benefit is convenience. Lying leg raises require no equipment and very little space, making them suitable for home workouts or travel routines. Difficulty can also be adjusted easily by bending the knees, reducing the lowering range, adding pauses, or progressing to more demanding variations over time.
Common Leg Raise Mistakes
Allowing the lower back to arch excessively is one of the most common leg raise mistakes. This often happens when the legs are lowered farther than the abdominal muscles can control. Reducing the range of motion can make the exercise more effective while decreasing unnecessary stress through the lumbar spine.
Another mistake is using momentum. Swinging the legs quickly may make it possible to complete more repetitions, but it reduces muscular control and can make the exercise less useful. Slower repetitions increase the demand on the core and make it easier to notice when your technique begins to break down.
Holding the breath is another common problem, especially when the exercise becomes difficult. Instead, breathe steadily and exhale during the challenging portion of the movement. Maintaining normal breathing can help you avoid unnecessary tension and keep the exercise smoother from beginning to end.
How to Keep Your Lower Back Comfortable
Lower-back comfort depends heavily on how well you control the pelvis during leg raises. Before lifting your legs, gently tighten your abdominal muscles and think about keeping your rib cage and pelvis relatively stable. You do not need to force the lower back completely flat, but excessive arching should be avoided.
If your back begins to lift as your legs approach the floor, stop the lowering phase earlier. A shorter range performed with control is more useful than lowering the feet close to the floor while losing position. Bent-knee leg raises can also reduce the load and make pelvic control easier.
People with existing lower-back pain should be cautious when adding leg raises. The exercise is not appropriate for every condition, and discomfort should not be treated as something to push through. If symptoms persist or worsen, a qualified healthcare or rehabilitation professional can help identify more suitable exercises.
Beginner Leg Raise Variations
Bent-knee leg raises are a good starting point for beginners. Instead of keeping the legs completely straight, bend the knees to approximately 90 degrees and lift them toward the torso. This shortens the lever and reduces the amount of force the abdominal muscles need to control.
Single-leg raises are another beginner-friendly option. Keep one foot on the floor while lifting and lowering the opposite leg under control. Alternating sides can help you practice trunk stability without managing the full resistance of both legs at the same time.
You can also practice heel taps or controlled marching from a lying position. These movements train core control with smaller ranges of motion before progressing to full leg raises. Building strength gradually makes it easier to learn proper technique and reduces the temptation to compensate with momentum.
Advanced Leg Raise Variations
Hanging leg raises are a more demanding progression because you must support your body from a pull-up bar while lifting the legs. This variation challenges grip strength, shoulders, hip flexors, and core stability at the same time. Beginners should develop good hanging control before attempting high-repetition sets.
Captain’s chair leg raises provide additional back and arm support while still allowing the legs to move freely. They can be performed with bent knees or straight legs depending on strength. Keeping the movement controlled prevents swinging and makes the abdominal muscles work more effectively.
Another progression is to add pauses or slower lowering phases to floor leg raises. For example, you can take three to five seconds to lower the legs before lifting them again. Increasing time under tension can make a familiar exercise harder without requiring additional equipment or large changes in technique.
How Many Leg Raises Should You Do?
The right number of leg raises depends on your experience, strength, and training goals. Beginners may start with two or three sets of controlled repetitions that can be completed without arching the lower back. Stopping when technique begins to decline is more useful than forcing a predetermined number.
As strength improves, you can increase repetitions gradually or progress to a more difficult variation. You can also add pauses or slower tempos before increasing total volume. Changing one variable at a time makes it easier to understand how your body responds and prevents the exercise from becoming unnecessarily difficult.
Leg raises do not need to be performed every day. The abdominal and hip muscles benefit from recovery just like other muscle groups. Two to four sessions per week may work well for many people depending on the rest of their training program and the intensity of each session.
Best Practices for Better Leg Raise Results
Focus on control rather than speed. The lowering phase is especially important because the abdominal muscles must resist the pull of the legs as they move toward the floor. Slowing this part of the exercise can increase difficulty and improve awareness without requiring additional weight.
Keep your training balanced by including exercises for the back, glutes, hips, and other core muscles. Leg raises are useful, but no single movement develops every aspect of core function. Planks, carries, anti-rotation exercises, squats, and hip-strengthening movements can complement them well.
Progress only when you can maintain good technique through the current variation. If you need to swing, arch the back, or shorten every repetition to continue, the exercise may be too difficult. Consistent quality repetitions are usually more productive than repeatedly attempting advanced versions before your body is ready.
How to Add Leg Raises to Your Workout
Leg raises can be included near the end of a strength session as a focused core exercise. Performing them after compound movements such as squats, rows, or presses allows you to train the abdominal muscles directly without interfering with heavier exercises earlier in the workout. Two or three controlled sets may be enough.
They can also be part of a short bodyweight circuit. Pair leg raises with exercises such as push-ups, lunges, glute bridges, and planks for a simple full-body routine. Keeping transitions manageable allows you to maintain good form instead of rushing through the movements.
If core strength is a major goal, you may choose to perform leg raises earlier in the session while you are less fatigued. The best position in a workout depends on your priorities. Regardless of timing, avoid adding so much abdominal work that soreness or fatigue begins interfering with your other training.
Conclusion
Leg raises are a versatile bodyweight exercise that strengthens the abdominal muscles, hip flexors, and surrounding stabilizers. They can be performed in several ways and scaled from simple bent-knee variations to demanding hanging leg raises. This flexibility makes them suitable for many fitness levels.
Proper form matters more than how low you can lower the legs or how many repetitions you complete. Keep the pelvis controlled, avoid excessive lower-back arching, and use a smooth tempo throughout the exercise. Adjust the range or variation whenever maintaining good technique becomes difficult.
For the best results, combine leg raises with a balanced strength program that trains the entire core, hips, and lower body. Progress gradually and allow enough recovery between challenging sessions. If leg raises repeatedly cause back or hip pain, professional assessment may help determine a more appropriate exercise option.
FAQs
Are leg raises good for your abs?
Yes. Leg raises challenge the abdominal muscles by requiring them to stabilize the pelvis while the legs move. The hip flexors also contribute significantly, so the exercise is not an isolated abdominal movement.
Why does my lower back hurt during leg raises?
Lower-back discomfort often occurs when the legs are lowered beyond the range your core can control. Reduce the range, bend your knees, and stop if pain continues or becomes worse.
Are bent-knee leg raises easier than straight-leg raises?
Yes. Bending the knees shortens the lever created by the legs and reduces resistance. This usually makes bent-knee leg raises a better starting point for beginners learning pelvic and core control.
How often should I do leg raises?
Many people can train leg raises two to four times per week depending on intensity and overall workout volume. Allow enough recovery if your abdominal or hip muscles remain noticeably sore or fatigued.
Can leg raises help reduce belly fat?
Leg raises strengthen the core but cannot selectively burn fat from the stomach. Changes in body fat depend on overall energy balance, nutrition, activity levels, genetics, and other individual factors.
