Plank, reach against the band, all the way around.
Don't let your hips twist when a hand lifts, fight the band with your core.
Every time a hand leaves the floor you lose a quarter of your support, and the band around your wrists drags the moving arm back toward the midline, so your core has to fight rotation and sag simultaneously. Working the taps around in both directions means no side gets to hide. It is anti-rotation training in its purest form, the skill that keeps your trunk solid under barbells and in sport.
Widen your feet for a bigger base and squeeze your glutes hard before each tap. If they still swing, make the taps smaller and slower until your trunk stays quiet.
Only as far as you can go with level hips. A short tap with a dead-still torso beats a long reach with your whole body wobbling.
Drop to your knees and run the same banded taps. You keep the anti-rotation work while shortening the lever, then graduate back to the full plank.
