
Plank jacks add a cardio workout to the plank.
In a high plank on your hands, arms extended, feet together, body aligned.
Jump to spread your feet apart, then jump again to bring them back together, like a horizontal jumping jack.
The hips remain stable and at shoulder height.
Image and text: Bryl Lim / Everkinetic — recoloré et rastérisé — CC BY-SA 4.0, via Workout Guide. Original entry