Jackknife Sit-Up
Performing the: A Step-by-Step Tutorial Jackknife Sit-Up
- In one swift movement, raise your legs and torso simultaneously, while keeping your legs straight, to a position where your body forms a V shape.
- Reach forward with your hands to try and touch your toes, which is the peak of the jackknife position.
- Hold this position for a second and then slowly lower your body back down to the starting position.
- Repeat this movement for the desired number of repetitions.
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