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  7. Hip Raise Bent Knee

Exercise guide

Hip Raise Bent Knee

  • Beginner
  • Isolation
  • Rep-based
  • Waist

The Bent Knee Hip Raise is a foundational core exercise that targets the lower abdominals and hip flexors by utilizing a posterior pelvic tilt. It is highly effective for improving pelvic stability and developing mind-muscle connection with the deep core.

Reviewed by the Crucible team · Updated June 2026

Watch the Hip Raise Bent Knee demonstrationGuided video and your full workout live in the Crucible app.

Muscles worked

Primary

  • Abs
  • Obliques

Secondary

  • Glutes
  • Hamstrings

Equipment

  • Body weight

Setup

  1. Lie flat on your back on a mat with your arms extended by your sides, palms facing down for support.
  2. Bend your knees at a 90-degree angle and lift your feet off the floor so your shins are parallel to the ground.
  3. Press your lower back firmly into the mat to eliminate any arch and engage your transverse abdominis.

How to do it

  1. Exhale and contract your lower abdominals to curl your hips off the floor, bringing your knees toward your chest in a controlled 'rolling' motion.
  2. Lift your pelvis as high as possible using only your core strength, avoiding the use of your hands to push off the floor.
  3. Inhale as you slowly lower your hips back to the starting position, maintaining the 90-degree bend in your knees throughout the descent.
  4. Perform the movement with a controlled tempo, focusing on a 2-second lift and a 2-second lowering phase.

Form checklist

  • Keep your neck and shoulders relaxed and flat on the mat at all times.
  • Ensure the movement comes from tilting the pelvis, not just swinging the legs.
  • Stop the descent before your lower back begins to arch off the floor.
  • Maintain a consistent 90-degree angle at the knees to keep the focus on the core.

Pro tips

  • Focus on the 'shortening' of the distance between your belly button and your ribcage to maximize abdominal recruitment.
  • Pause for one second at the peak of the contraction to emphasize the lower abdominal squeeze.
  • Press your palms lightly into the floor only for balance, not as a primary driver for the lift.

Make it harder

  • Slow down the eccentric (lowering) phase to 4 seconds to increase time under tension.
  • Hold a small medicine ball or foam roller between your knees to increase adductor and deep core activation.

Frequently asked

What muscles does the hip raise bent knee work?
The hip raise bent knee primarily targets the abs and obliques, and also works the glutes and hamstrings as secondary muscles.
What equipment do you need for the hip raise bent knee?
The hip raise bent knee requires no equipment — just your body weight.
Is the hip raise bent knee good for beginners?
Yes. The hip raise bent knee is a beginner-friendly movement and a strong foundation to build on.

Related exercises

  • 3/4 Sit-UpBeginner · abs and obliques
  • 45 Degree Bicycle Twisting CrunchIntermediate · abs and obliques
  • 45 Degree Lean Back Alternate Knee RaiseBeginner · abs and obliques
  • 45 Degrees Arms PlankIntermediate · abs, deltoids, obliques, and pectorals

Train this with a plan, not guesswork

Crucible builds the hip raise bent knee into a precise program around your body, equipment, location, and time.

Download on the App Store