FIG. 2.

Exercise training levels allocated by stratification algorithm. The EL-FIT app considers the following 3 levels of training: (1) Strength & Mobility Training, which starts with exercises in a chair for patients who are frail and builds up physical challenges until patients can do basic standing exercises; (2) Low-Intensity Training, with various workouts that assume patients have gained full mobility; and (3) Moderate-Intensity Training, which includes more complex workouts for the physically robust with no limitations. The stratification algorithm considers liver and physical function data to allocate patients to 1 of these 3 training levels. Patients can graduate from 1 level and move on to the next level. A fourth section, Balance & Miscellaneous, includes workouts aiming to prevent falls, help with back pain, and a basic Tai Chi form favoring coordination. This fourth section is only made available to patients allocated to Low-Intensity Training or Moderate-Intensity Training.