Thanh Vo uses this session with every rider on his roster, all year, because it does one thing precisely: it teaches a rider to sit at critical power without drifting over it. Going over CP spends W′ and turns a threshold session into something else; staying just under it produces the aerobic adaptation with far less strain, which is why the session fits in preseason and in the middle of a race block alike.

The step-up ladder is not a warm-up in disguise. Three-minute steps at 65, 75, 85 and 95% of CP, then a thirty-second lift to 150%, take the rider through every zone below and one above the target, so the four eight-minute efforts that follow start with the body primed and the rider knowing exactly what CP feels like today.

The optional endurance block at the end turns the session into a longer day without adding intensity. In Vekta the efforts are written at 95–105% of CP, which means they follow the rider's current CP rather than a test from months ago; if a rider's CP has moved, the session moves with it.

Twice a week in a build, once a week in maintenance. If the last effort is slower than the first, the rider went over in the early ones.