BYT

Brace · Bodyweight · Learn first

Mountain climber

A high plank, hands under the shoulders, body in one line.

Mountain climber
  1. 1Draw one knee toward the chest, then switch.
  2. 2Keep the hips level. Don't pike.
  3. 3Move at a pace you can still breathe through.

Easy to miss: Bouncing the hips and losing the plank.

Muscles

Copper on the figure is a prime mover. The softer tone helps.