Waist Exercise · Body Weight

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Arm Slingers Hanging Bent Knee Legs

Category

Waist

Equipment

Body Weight

Target

Abs

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Biomechanical cues verified by the PlanWorkouts Science Review Board under CSCS editorial oversight; see our editorial standards.

Hanging with bent knees while slinging the arms works the abs isometrically as they fight to keep the torso from swinging, with the shoulders picking up real work just holding the position. It's less about the arm movement itself and more about resisting rotation through the trunk. Control the swing rather than letting momentum carry it, or the exercise turns into just hanging around.

How to Do the Arm Slingers Hanging Bent Knee Legs

1. Grip a pull-up bar and hang with your arms straight, letting your knees bend to roughly 90 degrees.
2. Brace your core and raise your bent knees up toward your chest, aiming to bring them as near to your elbows as you can.
3. Under control, let your legs drop back down to the hanging start position.
4. Repeat for your target rep goal, keeping your core engaged and avoiding any reliance on momentum.

Biomechanical & Joint Load Cues

Trunk flexion, anti-extension, or anti-rotation targeting rectus abdominis and obliques. Requires posterior pelvic tilt to isolate abdominal fibers.

Common Mechanical Mistakes & Form Errors to Avoid

• Pulling on the Neck / Cervical Spine: Yanking the head forward with hands during crunches places excessive strain on cervical vertebrae without engaging the abs.
• Arching Lower Back Under Load: Allowing the lumbar spine to hyperextend during leg raises shifts work to the psoas hip flexors and pinches facet joints.
• Rushing Through Reps: Using fast bouncing tempo bypasses deep transverse abdominis engagement; slow reps with a full exhale build real core strength.

Proper Breathing Patterns & Core Engagement

Exhale completely during spinal flexion or maximal tension to maximize abdominal contraction; inhale on controlled return.

Injury Modification & Joint Safety

Individuals with lumbar disc herniations should prioritize isometric anti-extension (planks, dead bugs) over repetitive loaded spinal flexion. If joint irritation persists, immediately stop and substitute this movement with another exercise from the Waist exercises category.

Muscles Worked

The Arm Slingers Hanging Bent Knee Legs primarily targets the Abs, with Shoulders as the primary synergist muscle group, along with the Back.

More Waist Exercises

3/4 Sit-Up Body Weight · Abs 45° Side Bend Body Weight · Abs Air Bike Body Weight · Abs Alternate Heel Touchers Body Weight · Abs Arm Slingers Hanging Straight Legs Body Weight · Abs Arms Overhead Full Sit-Up (male) Body Weight · Abs

More Abs Exercises

Assisted Hanging Knee Raise Assisted · Abs Assisted Hanging Knee Raise With Throw Down Assisted · Abs Assisted Lying Leg Raise With Lateral Throw Down Assisted · Abs Assisted Lying Leg Raise With Throw Down Assisted · Abs Assisted Motion Russian Twist Medicine Ball · Abs Assisted Prone Rectus Femoris Stretch Assisted · Abs

Equipment Alternatives

Don't have body weight? These target the same abs with different equipment.

Assisted Hanging Knee Raise Assisted · Abs Assisted Motion Russian Twist Medicine Ball · Abs Band Alternating V-Up Band · Abs Barbell Press Sit-Up Barbell · Abs

FAQ

What muscles does the Arm Slingers Hanging Bent Knee Legs work?

The Arm Slingers Hanging Bent Knee Legs primarily targets the abs as the primary agonist. Synergist assistance is provided by the shoulders along with the back. Maintaining strict biomechanical alignment ensures maximal tension remains focused on the intended muscle fibers rather than shifting to surrounding stabilizer joints.

What equipment do I need for the Arm Slingers Hanging Bent Knee Legs?

The Arm Slingers Hanging Bent Knee Legs is performed using no equipment — just body weight. Ensure all equipment is securely positioned with collars or safety pins locked before loading working sets. If you train in a home gym or minimal setup, explore our equipment-free and resistance band alternatives below.

What is the most common form mistake on the Arm Slingers Hanging Bent Knee Legs?

The most frequent error is pulling on the neck / cervical spine: Yanking the head forward with hands during crunches places excessive strain on cervical vertebrae without engaging the abs.. Controlling the 2 to 3-second eccentric lowering phase ensures maximal hypertrophic stimulus while shielding connective tissue.

How many sets and reps should I perform on the Arm Slingers Hanging Bent Knee Legs?

For muscle growth and density, execute 3 to 4 working sets of 10 to 15 controlled repetitions with 60 seconds rest, emphasizing a deep stretch and deliberate peak contraction on every rep.

What's a good alternative to the Arm Slingers Hanging Bent Knee Legs?

If you don't have access to the space or setup it needs, the Assisted Hanging Knee Raise targets the same abs using assisted instead. This alternative replicates the same joint angle and movement plane while allowing you to train effectively with different available gear. You can also substitute it seamlessly in our free Workout Plan Builder.