These could include one or more of the following.
FT manual wheelchair user, PT manual wheelchair user, electric wheelchair, collapsible wheelchair, walker, crutches, stroller, infants/toddlers, late-term pregnancy, bad back, balance issues, slow walker, elderly, etc.
Blind or low vision, deaf or hard of hearing, and/or low sensory.
We have found that these answers can expand your offering to more people than you might initially think could participate.