Hanging Knee Raise: Build Lower Ab Strength
The hanging knee raise is a core exercise performed from a pull-up bar where you bring your knees toward your chest, targeting the lower rectus abdominis and hip flexors with a shorter lever than straight-leg raises.
Proper Form
Hang from a pull-up bar with an overhand grip, arms fully extended, shoulders pulled down away from ears.
Brace your core and tilt your pelvis posteriorly to initiate the movement from your abs.
Bring your knees up toward your chest, curling your pelvis upward at the top.
Pause for one second at the top, squeezing your lower abs.
Lower your knees slowly back to the hanging position without swinging.
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Hanging Knee Raise on GLP-1 Medications
Hanging knee raises are the ideal bridge exercise for GLP-1 patients who have outgrown lying leg raises but are not ready for full hanging leg raises. The bent-knee position shortens the lever arm, making the exercise manageable even for patients still developing core strength. As body weight decreases on GLP-1 therapy, the relative difficulty of hanging exercises drops, providing a clear sense of progress. Use ab straps if grip strength is a limiting factor, and focus on the pelvic curl at the top to ensure your abs, not just your hip flexors, are doing the work.
Variations
- 1Single knee raise — alternate knees for reduced difficulty
- 2Knee raise with twist — bring knees to alternate sides for oblique work
- 3Slow eccentric knee raise — 5-second lowering phase for increased time under tension
- 4Weighted knee raise — hold a dumbbell between your feet
The Progression Pathway to Hanging Leg Raises
Hanging knee raises sit in the middle of a natural progression: lying leg raises to captain chair knee raises to hanging knee raises to hanging leg raises to toes-to-bar. Each step increases the lever arm and the total body control required. Do not skip steps. Master 3 sets of 15 controlled hanging knee raises with no swing before attempting straight-leg raises. The patience to progress methodically will build more core strength than jumping to the hardest variation with sloppy form.
The Pelvic Curl: What Separates Effective from Useless Reps
Most people perform hanging knee raises by simply flexing their hips — pulling their knees up with their hip flexors. This works the psoas and rectus femoris but minimally engages the abs. The difference between a hip flexion exercise and an ab exercise is the pelvic curl at the top. After your knees reach chest height, actively curl your pelvis upward by rounding your lower back. This posterior pelvic tilt shortens the rectus abdominis and produces the intense lower-ab contraction that makes the exercise effective.
- The pelvic curl is small but essential — your lower back rounds toward the ceiling
- If you only feel this in your hip flexors, you are skipping the curl
- Exhale forcefully at the top to enhance the abdominal contraction
- Visualize pulling your belt buckle toward your chin
Programming Hanging Knee Raises
Perform 3-4 sets of 10-15 reps two to three times per week. Keep each rep slow and controlled — if you find yourself swinging, reduce reps or rest longer between sets. Superset hanging knee raises with pull-ups for an efficient bar workout. Once 3 sets of 15 is comfortable with a full pelvic curl and no swing, begin transitioning to straight-leg raises by performing the first few reps of each set with straight legs and finishing with bent knees when fatigue sets in.
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Exercise Disclaimer
This content is for informational purposes only and does not replace professional instruction. Consult a qualified trainer or healthcare provider before starting any exercise program. Individual calorie burn varies based on fitness level, intensity, and body composition.
Frequently Asked Questions
Hanging knee raises bend the knees, shortening the lever arm and reducing difficulty. Hanging leg raises keep the legs straight, creating a longer lever arm and requiring significantly more core strength. Knee raises are the easier progression that builds the foundation for straight-leg raises.
Pause for a full second at the bottom of each rep before initiating the next one. Pull your shoulder blades down into an active hang. Use a slightly narrower grip. If swinging persists, perform the exercise more slowly or reduce the number of reps per set.
Ab straps are useful when grip strength fails before your core does. For pure core training, straps allow you to train to true ab failure. However, periodically performing sets without straps builds the grip strength needed for progression to harder variations.
You can, but three to four sessions per week is more practical and allows for recovery. The core recovers quickly, but the grip and shoulder stabilizers used in hanging exercises benefit from rest days between sessions.
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