Rushing the return

Almost everyone controls the effort phase and then lets the springs pull the carriage home. That discards half the exercise — the eccentric return is where most of the strength benefit and nearly all of the control benefit sits.

The fix is counting. Push for two, return for three. It feels absurdly slow for the first week and then becomes the default.

Gripping the hip flexors

In any exercise where the legs are loaded and the spine should stay still, the hip flexors will happily take over if the deep abdominals are slow to engage. The tell is a lower back lifting away from the carriage.

Reduce range before reducing spring. Most people can hold the position correctly through a smaller range long before they can through a full one.

Rib flare and over-springing

Lower ribs lifting away from the pelvis during overhead or extension work means the load has exceeded your current control. It is not a cue problem, it is a load problem.

The related error is treating more spring as more progress. On assisted exercises a heavier spring makes the work easier, and on resisted ones it frequently just recruits larger muscles to cover for control you have not built.

  • Return the carriage slower than you push it
  • Reduce range before reducing spring
  • Keep the lower ribs down over the pelvis
  • Match spring to the exercise, not to ambition
  • Stop the set when position degrades, not when reps run out

Counting reps instead of quality

A set ends when position degrades, not when the number is reached. Five controlled repetitions build more than ten in which the last four are compensated.

This is the hardest habit to break for people arriving from conventional gym training, where completing the set is the objective.