Bent-Leg Jackknife - Sweat
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Bent-Leg Jackknife

Sweat - sweat.com

How to: Bent-Leg Jackknife

Primary Muscles Used:Abs, Rectus Abdominis

Exercise Families:Trunk Flexion

Trainer:Kayla Itsines

  1. Start by lying on your back on a yoga mat with your arms extended above your head. Engage your abdominal muscles by drawing your belly button in towards your spine and elevate your legs off the mat slightly. This is your starting position.
  2. Inhale. Bend your knees and using your abdominals, draw them in towards your chest, ensuring that your feet stay together. At the same time, bring your arms forward towards your feet, slowly lifting your head, shoulder blades and torso off the mat.
  3. Exhale. Slowly lower your arms and extend your legs to return to the starting position, but without lowering your feet to the floor. Repeat for the specified number of repetitions.

Alternative Exercises for Abs

* Disclaimer: This blog post is not intended to replace the advice of a medical professional. The above information should not be used to diagnose, treat, or prevent any disease or medical condition. Please consult your doctor before making any changes to your diet, sleep methods, daily activity, or fitness routine. Sweat assumes no responsibility for any personal injury or damage sustained by any recommendations, opinions, or advice given in this article.

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