Jack knife Floor Exercise Guide
Exercise Profile
- Target
- Rectus Abdominis
- Equipment
- Body weight
- Body Part
- Waist
- Primary Muscle
- Rectus Abdominis
- Secondary Muscles
- Adductor Brevis, Tensor Fasciae Latae, Obliques, Hip Flexors, Adductor Longus, Sartorius, Iliopsoas, Pectineous
- Intensity
- medium
- Category
- strength
- Skill Level
- intermediate
- Estimated Calories
- 5.5
- Alternate Names
- Jackknife Crunch
How to: Jack knife Floor
- Lie flat on your back with your legs extended and arms straight above your head.
- Simultaneously lift your legs and torso towards each other while reaching your arms towards your feet.
- Form a 'V' shape with your body at the peak of the movement.
- Slowly lower back to the starting position and repeat.
Common Mistakes
- Using momentum instead of controlled movement.
- Not engaging the core properly, leading to back strain.
Modifications
- Perform the exercise with bent knees to reduce the strain on the lower back.
- Use a mat for added cushioning under your back.
Tips
- Engage your core throughout the movement to avoid straining your lower back.
- Slowly control your movement to maximize muscle engagement.
Jack knife Floor Alternatives
Tags
core
abdominals
strength
waist
exercise
fitness