HOW: The high plank position looks like the top of a push up position. Place a band around your back at shoulder blade height, hold the band in each hand between your thumb and index finger. Assume this position on the ground on your hands and toes. 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. Really focus on pushing against the band, keeping your shoulder blades pushed apart and your chest as far away from the ground as it can be.
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. Maintain max tension on the band