Code Name: Ghost is a bodyweight circuit built around stillness. Sumo squat holds, squat step backs, plank holds, a single push-up, and punches - but the movement is almost incidental. Most of your time in this workout is spent holding a position and refusing to leave it. It is quiet, low-impact and deceptively hard, which is exactly how a ghost operates: no noise, undeniable presence.

The structure is hold - move - hold. A 10-count sumo squat hold brackets ten squat step backs, then a 10-count plank hold brackets a single push-up, and ten punches close the circuit. The isometric holds pre-fatigue the working muscles so that the dynamic movement in the middle lands on legs and shoulders that are already burning. That lone push-up is not a typo - after twenty counts of plank on either side of it, one perfect rep is worth ten rushed ones. The holds teach your muscles to produce force without movement; the moves in between teach them to switch from static to dynamic without losing tension.

In the sumo hold, sit low enough that your thighs actually work - knees tracking over toes, torso upright, weight through your heels. In the squat step backs, stay at depth as you step; the moment you rise between reps, the exercise stops working. Keep your plank a straight line from head to heels with your glutes switched on, and lower into the push-up under full control. Throw the punches from a stable base with your core braced - controlled and complete, each one finishing before the next begins.

The workout that makes no sound is the one your legs will hear about tomorrow.

Make it Harder: Double every hold to a 20-count.

Make it Easier: Drop to your knees for the plank holds and the push-up.