How it works

Step one

It plans a whole week at a time.

Not one workout at a time. Planning day by day is how a muscle ends up trained three times one week and not at all the next — each session looks reasonable on its own and the week does not add up. Dextri lays out the whole week against what every muscle group is owed, then serves you the session the day calls for.

• You say how often you train, and for how long

  Sessions are built to fit the time you actually have, not a generic hour.

• You say what is in your gym

  The program is built out of the bars, plates, dumbbells and machines you can reach. No prescribing a hack squat to someone training in a garage.

• It adjusts to what you actually did

  Sets you skipped, weights you changed, a lift that went badly — next week is planned from what happened, not from what was scheduled.

Step two

The set runs itself.

The screen shows you the lift, the weight and the number of reps to hit. Then you lift. The count goes up as you go. When you are done the set is already recorded and the next one is on screen.

• With the sensors

  The band picks up the first rep and counts on the way up. The set ends when you rack it. Your phone can stay in your pocket the whole session.

• Without them

  One tap ends the set and moves you on. The plus and minus are right there if the count was different from the plan. That is the whole difference — one tap.

• When it is not sure

  It asks. A count that is usually right and occasionally wrong is worse than one that admits it did not see the set clearly, because checking every number costs you more attention than tapping would have.

Step three

It reads how the reps moved, not just how many.

Counting reps is the easy half. The half that changes your training is what the reps looked like — and that is measured after the set, never during it. Nothing is shown to you mid-set that could pull your attention off the lift.

All of it feeds one decision: what you lift next week.

The hardware

Two sensors, and neither one is required.

One goes on your wrist, one clips to your shoe. The wrist sees the working limb; the shoe sees whether the rest of you moved, which is how the pair tells a rep from a shrug. They agree or they do not, and when they do not, Dextri asks you rather than making a number up.

They are a convenience, not a gate. If you never buy them, the program, the weights, the logging and the progression all work exactly the same — you tap to end a set instead of it ending itself.

Common questions →