Band jack knife sit-up
The band jack knife sit-up is an intermediate core exercise that targets the abs using a resistance band. The movement involves lying on your back with the band secured around your feet and holding the other end with your hands. You then perform a sit-up while simultaneously bringing your knees towards your chest, engaging your core throughout the movement.

At a glance
- Area
- Waist
- Main muscle
- Abs
- Equipment
- Band
- Level
- Intermediate
Form tips
- Keep your core engaged throughout the movement.
- Avoid pulling on your neck with your hands.
- Control the movement, both on the way up and down.
What to watch out for
- lower back pain
- recent abdominal surgery
- pregnancy
Also known as
Sit-up con banda elastica, banded jackknife sit-up, core exercise with band