Jack Split Crunches
Expert Advice
Ensure that you are engaging your core throughout the exercise and not relying on the momentum of your legs.
How-to-do Steps
- Lie on your back with your hands behind your head and legs extended.
- Perform a traditional crunch by lifting your upper body off the floor.
- As you crunch up, split your legs apart and then bring them back together.
- Lower your upper body and legs back to the starting position.
- Repeat for the desired number of repetitions.
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Muscles Worked
Jack Split Crunches primarily targets the Quads, Abs, with Strength mechanics using Body Weight. Understanding muscle activation patterns helps you focus on proper engagement and maximize training effectiveness.
Primary
Quads40%
Abs40%
Secondary
Glutes20%
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 Split Crunches work?
Jack Split Crunches primarily targets the Quads, Abs. Secondary muscles involved include Glutes. It is classified as a Strength exercise performed with Body Weight.
How many sets and reps should I do for Jack Split Crunches?
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 Split Crunches suitable for beginners?
Jack Split Crunches 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.
