Bent & Straight-Leg Jackknife
How to: Bent & Straight-Leg Jackknife
Primary Muscles Used:Abs, Rectus Abdominis
Exercise Families:Trunk Flexion
- Start by lying straight on your back on a yoga mat with your legs extended out in front of you and 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.
- Inhale. Exhale. 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 hands forward towards your feet, slowly lifting your head, shoulder blades and torso off the mat.
- Inhale. Slowly lower your arms and extend your legs to return to the starting position, but without lowering your feet to the floor.
- Exhale. While keeping your legs extended, slowly raise your legs upwards until they form a 90-degree angle with your hips. At the same time, bring your hands forward and upward towards your feet, slowly lifting your head, shoulder blades and torso off the mat.
- Inhale. Slowly lower your arms and legs to return to the starting position, but without lowering your feet to the floor. You should feel tension in your core throughout the movement. Continue alternating between bent- and straight-leg jackknifes for the specified number of repetitions. Each jackknife is equivalent to one repetition.
Alternative Exercises for No Equipment
* 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.