Grip Strength

press exactly this hard. no harder, no softer.

squeeze to an exact level and hold it steady — then trace a shape, then just hang on

Holding a precise pressure steady, tracing a rise-plateau-fall shape, and simply hanging on are three different skills, and doing well at one doesn’t guarantee the others — fine control and raw endurance come apart. The pressure reading comes from your device’s touch sensor, or on phones without one, from an approximation based on press timing, so treat the numbers as a feel for your own control rather than a clinical measurement.

Concepts: strength, proprioception.

An interactive you play with one thumb, on Wundr.