Jack Knife sit-up is exercise that also targets your body.
The only Jack Knife sit-up equipment that you really need is the following: NO EQUIPMENT. There are however many different Jack Knife sit-up variations that you can try out that may require different types of Jack Knife sit-up equipment or may even require no equipment at all.
Learning proper Jack Knife sit-up form is easy with the step by step Jack Knife sit-up instructions, Jack Knife sit-up tips, and the instructional Jack Knife sit-up technique video on this page. Jack Knife sit-up is a exercise for those with a intermediate level of physical fitness and exercise experience.Watch the Jack Knife sit-up video, learn how to do the Jack Knife sit-up, and then be sure and browse through the Jack Knife sit-up workouts on our workout plans page!
This lift gets rated at an INTERMEDIATE difficulty level.If you are just starting out with exercising your time would be better spent training your core with different planking methods before attempting this lift.
The Primary muscles recruited when you do this exercise is your body.
Building a strong body has been shown to reduce back pain and reduce the risk of lower back injuries in everyday life.
Thanks to these exercises, your sports performance increases when you engage in many different activities that require core strength (like tennis, soccer, boxing, football, any sport with rotational movement).
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In Gym Navigator you can find list of exercises with movies for many body parts.
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You can also find exercises grouped into workout plans, which you can use to improve you body. Each routine show you exercises one by one and give you possibility to count you progress and count down rest time.