How to Do:
- Lie on your back with your legs straight and your arms down by your sides.
- Lift your legs up in the air and try to touch your toes with your hands without bending your arms.
- Stay like that for a bit, then slowly go back to how you started.
What muscles do jack knives work?
Jack knives work your tummy muscles, also known as your “core.”
What is jackknife exercise good for?
The jackknife exercise is great for making your tummy strong and helping you bend and stretch better.
What is the difference between jackknife and V-ups?
Jackknives and V-ups are kinda similar. With jackknives, you touch your toes while lying down, but with V-ups, you also lift your upper body, making a “V” shape.
How do jack knife crunches?
To do jackknife crunches, first, lie on your back. Then, lift your legs and upper body, trying to touch your toes with your hands. After, go back down slowly. Like this: up, touch your toes, and then down.
