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TRX Jackknife

Learn how to properly perform the TRX Jackknife with this complete demonstration video.

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What is the TRX Jackknife?

The TRX Jackknife is an advanced core exercise that intensely targets the trunk muscles. This exercise is excellent for improving core strength and stability. It requires good coordination and excellent muscle control, making it suitable for intermediate to advanced practitioners.

How to properly perform the TRX Jackknife

  1. Adjust the TRX straps to an appropriate length and secure them to a stable anchor point.
  2. Assume a push-up position with your feet in the TRX foot cradles and your hands on the ground shoulder-width apart.
  3. Engage your core muscles and lift your hips, bringing your knees towards your chest.
  4. Keep your body in a straight line from head to heels and avoid sagging or arching your back.
  5. Pause for a moment at the top of the movement, then slowly extend your legs back to the starting position.
  6. Repeat for the desired number of repetitions, focusing on maintaining control and stability throughout the exercise.

Targeted muscles and equipment

Discipline
  • Strength training
Primary muscle
Secondary muscle(s)
Required equipment
Mechanics type

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Complementary exercises

Other exercises for Abdominals:

Standing Cable CrunchesMedicine Ball Sit-up (wall)Barbell Seated Twist (on stability ball)

Explore more exercises with TRX or other exercises for Abdominals.

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Jack Knife TRX
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