Fitness 20 โ€” User Manual

Last updated: August 21, 2026

Everything Fitness 20 does, in the order you will meet it.

What it is not. Fitness 20 provides general fitness guidance. It is not medical advice, not physiotherapy, and not a diagnosis. If something hurts, if you are pregnant or postpartum, or if you have a condition that exercise could affect, talk to a clinician before starting and stop if a movement causes pain.

Your first session

  • Open the app and pick your shape goal โ€” build or maintain. This sets how many hard sets each session asks for, and you can change it later.
  • Do the daily check-in: energy, soreness, sleep, and how active you have already been.
  • The app picks today's session from that. Tap Start.
  • Each movement shows its target and a lighter option. Take the lighter option whenever the target is not available to you today.

The weekly plan

Six focused strength days cover the major muscle groups in an order that does not double up on a sore group, plus one restore day. If your recovery signals say you need it, the restore session can swap in on a strength day without breaking the streak โ€” coverage catches up across the week rather than the day.

Reading the Body Signal Decoder

When your measurements and the scale disagree, or progress feels stalled, the Decoder explains which of the ordinary causes fits โ€” early adaptation, a scale-versus-shape mismatch, a digestive pattern, or simply that twelve weeks have not passed yet. It also names the small set of signals that are worth a doctor rather than an app. It never diagnoses.

Tracking progress

  • Completed days and weekly muscle coverage appear on the progress view.
  • Add measurements and a clothes-fit note every two weeks โ€” not daily. Daily scale weight moves for reasons that have nothing to do with training.
  • Nothing here is uploaded. It lives on the device.

On Apple TV

The TV surface is the workout player: start the session and follow along on the big screen. Detailed check-ins and editing stay on your phone, tablet or computer where typing is practical.

If something goes wrong

Email [email protected] or use the contact form. Include your device and OS version. Because there is no account, there is nothing we can look up on our side โ€” tell us what you saw and what you expected.