Jack knife Floor
Expert Advice
Focus on using your abdominal muscles to initiate the movement, and avoid using momentum to lift your torso and legs.
How-to-do Steps
- Lie flat on your back with your legs extended and arms extended overhead.
- Simultaneously lift your upper body off the floor while also raising your legs towards the ceiling.
- Try to touch your toes with your fingertips at the top of the movement.
- Slowly lower your arms and legs back to the starting position without letting them touch the floor.
- Repeat for the desired number of repetitions.
Track Jack knife Floor in FitAI
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Muscles Worked
Jack knife Floor primarily targets the Abs, with Strength mechanics using Body Weight. Understanding muscle activation patterns helps you focus on proper engagement and maximize training effectiveness.
Primary
Abs70%
Secondary
Quads30%
Equipment
Body Weight
Exercise Type
Strength
Sets & Reps Guidance
Beginner3 x 10-12
Intermediate4 x 8-10
Advanced4 x 6-8
Frequently Asked Questions
What muscles does Jack knife Floor work?
Jack knife Floor primarily targets the Abs. Secondary muscles involved include Quads. It is classified as a Strength exercise performed with Body Weight.
How many sets and reps should I do for Jack knife Floor?
For beginners, start with 3 sets of 10-12. Intermediate lifters can do 4 sets of 8-10. Advanced athletes can push to 4 sets of 6-8. Adjust based on your goals and recovery capacity.
Is Jack knife Floor suitable for beginners?
Jack knife Floor is rated as intermediate difficulty. Beginners may want to start with lighter loads or simpler variations and progress to this exercise as their strength and coordination improve.
