Table 1.

Summary of Recommended Design Features for Home Rehabilitation Technology.

Domain	Recommendation
Hardware design	System is small, lightweight, easy to store, portable33,34 -38
	Hardware is adjustable for different body sizes and different grip types or movements34
	Sensors are reliable and validated sensor accuracy33,34 -36
	System can be interfaced with the user’s existing TV, computer, or mobile device39
	System is robust and not easily damaged37,38
	Hardware promotes quality movements and helps prevent compensatory motions37,39
Software interface design	Software is easy to navigate, with clear and simple operating instructions34,35,39
	Software provides a tutorial or introduction to use34
	Software contains clear text displayed in a large font size35
Operation	System requires simple installation, setup, shut down, and charging procedures33,34,37
	System is simple enough to be used with minimal external support34,37,38,40
Therapeutic activity design	Activities are physically challenging but also achievable34,37,39,41
	Activities incorporate games or gamification to enhance motivation33
	Activities are tailored to personal goals, needs, and interests33,42
	System includes a variety of activities that accommodate different ability levels33,34,37,39
	Difficulty and duration adapt as user improves, both over time and in the moment33,40
	Movements practiced relate to functional movements or activities of daily living (ADL)34,39
Performance feedback	Feedback is multi-modal (eg, numerical, graphical, and auditory)34,39,40
	Feedback on performance is provided during the activity35,39
	Summary feedback is presented immediately after the activity is complete34,35,37,39
	A history of the user’s performance over time is available33,34,35,39
	System enables goal tracking35
	System encourages periods of rest when applicable37
	System provides positive feedback with a partial reinforcement schedule37
	A healthcare professional can monitor the user remotely and provide feedback34,39,40
Support	Technical support is available, especially at start of use33
	Support is offered using multiple communication methods (eg, text, voice, and video)39
	Support is available in different languages39
	System enables healthcare providers to communicate with user39
Safety	An emergency stop button and/or warning messages are provided when appropriate34
	Hardware design avoids sharp edges, possible finger traps, and protects the users’ skin34
Cost	System is relatively low cost37,38,41
User’s social context	System is attractive and acceptable to the user and their family members33
	System does not create additional burden on family members or caregivers37
	System can be used cooperatively with a family member or friend39

FitMi was designed to incorporate most of these features, except for the 4 that are italicized, which can be grouped into 2 categories: ensuring that high-quality movements are practiced and facilitating collaboration with a therapist or caregiver. We generated this table based on a systematic review of recommendations,³⁴ but also incorporated suggestions from other studies of home rehabilitation technology that were not included in that review, as indicated by the referencing.