A "high plank" refers to a position in exercise or yoga where you hold your body straight like a plank, with your hands directly beneath your shoulders, and your toes on the ground, while keeping your body lifted off the floor. Full definition
Tap 1: Start in high plank position with both arms straight and wrists directly below the shoulders. (health.com)
You'll start the sequence in high plank with your fingers spread out on the yoga mat so your weight is evenly distributed. (health.com)
Get into high plank position with hands on floor, arms straight, and lower your upper torso down to the ground and then push yourself back up to start position. (robinskey.com)