| Movement | Open-plan desk Silent, seated, semi-public, formal shoes. | Commuter train Moving, seated, public, no support. | Kitchen, waiting for the kettle Private, a counter to hold, socks. | Hospital waiting area Public, seated, silent, unpredictable. |
|---|---|---|---|---|
| Seated thoracic opener | Available | Available | Available | Available |
| Counter-supported calf raise | Needs arms length; you have seat only. | Needs arms length; you have seat only. | Available | Needs arms length; you have seat only. |
| Floor hip opener | Needs open room; you have seat only. | Needs open room; you have seat only. | Needs open room; you have one stride. | Needs open room; you have seat only. |
| Standing single-leg balance | Needs arms length; you have seat only. | Needs arms length; you have seat only. | Available | Needs arms length; you have seat only. |
The commuter train column is the interesting one: three of four movements are blocked, and only the seated opener survives. That is the whole product in one cell — most apps would have offered a squat.