Axis is a standing rotation and coordination circuit that treats your spine as exactly what the name says it is - the central axis everything else turns around. Wide arm circles, march arm circles, twists and raised arms twists make up the whole workout. No floor, no equipment, no impact. What it trains is the ability to rotate, balance and coordinate limbs around a stable center, which is the skill underneath throwing, swinging, running and not falling over.

March arm circles appear three times in seven exercises, and that repetition is the engine of the workout. Circling both arms while marching in place is a genuine coordination challenge - each return to it comes after a different neighbor, so your nervous system has to re-solve the pattern with slightly different fatigue and a slightly different starting point every time. The wide arm circles that open and close the first half keep the shoulders moving through their full arc, while the twists and raised arms twists rotate the thoracic spine against a fixed pelvis. Movement around the axis, then rotation of the axis itself, alternating until both feel natural.

Make the arm circles large and smooth rather than fast - the full arc matters more than the count speed. In the march arm circles, lift the knees to hip height and keep the circles going independently of the steps; if the arms and legs sync up into one rhythm, deliberately break it. Twist from the ribcage with your hips facing forward, and in the raised arms twists keep both arms at shoulder height as one line from fingertip to fingertip, so the rotation stays in the spine instead of drifting into your shoulders.

Everything you do standing up happens around this axis - it makes sense to keep it well-oiled.

Make it Harder: Slow the marches down and pause for a full beat at the top of every knee raise.

Make it Easier: Step in place instead of marching with high knees.