Plank (Knee to Elbow)

How to do it

1. Set up in a high plank with the hands under the shoulders and the body in a straight line from head to heels.
2. Brace the core and shift weight slightly onto the opposite hand and foot to free one leg.
3. Draw one knee forward and across the body toward the elbow, rounding through the trunk to bring them close.
4. Return the foot back to the starting plank position under control, resetting a stable base before the next side.
5. Alternate sides at a controlled pace, keeping the hips low and level rather than piking upward as the knee drives in.
6. Continue for the prescribed time while breathing steadily; rushing the knee drive and letting the hips rise is the most common fault to correct.

Muscles worked

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