HOW: The tall plank position looks like a push up position. Assume this position with your hands on an elevated surface and toes on the ground. Simply hold this position for the desired amount of time.
FEEL: You should feel your core muscles working to hold this position. You will also feel your arm, shoulder, and chest muscles working.
COMPENSATION: Do not lose a good plank position, keep your elbows straight, strong through your shoulder blades, and do not excessively arch or bend your back