Plank Jackknife

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The Plank Jackknife is a bodyweight exercise that primarily engages the abdominal muscles.

By using the bodyweight as resistance, this exercise targets the rectus abdominis and obliques.

It involves starting in a high plank position and then bringing the knees towards the chest.

This movement activates the core muscles and helps improve stability and overall abdominal strength.

Start in a high plank position with your hands directly under your shoulders and your body forming a straight line from head to heels.
Engage your core and squeeze your glutes.
Jump your feet wide apart, keeping your core tight and your back straight.
Immediately jump your feet back together, returning to the starting position.
Keep your core engaged throughout the movement and avoid sagging or arching your back.
Continue jumping your feet wide apart and back together for the desired number of repetitions.
Focus on using your bodyweight to engage your abdominal muscles and improve your exercise form.

Start by assuming a high plank position, with your hands directly under your shoulders and your body in a straight line from head to heels. Engage your core by pulling your belly button towards your spine.
As you exhale, jump both feet wide apart, just like you would in a jumping jack. Keep your core tight and your hips stable throughout the movement.
Next, as you inhale, jump your feet back together, returning to the starting position. Imagine that you are pulling your legs towards your chest, engaging your lower abs in the process.
Focus on maintaining a controlled and steady pace, rather than rushing through the exercise. This will help you maintain proper form and maximize the engagement of your abdominal muscles.
If you find it challenging to perform the exercise with proper form, you can modify it by stepping your feet out one at a time instead of jumping. This will still target your abs effectively while allowing you to build strength and stability.