[1] Idaho State Univ, Coll Educ, Dept Human Performance & Sport Studies, Pocatello, ID 83209 USA
[2] Univ Illinois, Ctr Hlth Aging & Disabil, Coll Appl Hlth Sci, Urbana, IL USA
[3] Univ Illinois, Dept Occupat Therapy, Chicago, IL USA
[4] Univ Illinois, Dept Kinesiol & Community Hlth, Coll Appl Hlth Sci, Urbana, IL USA
[5] Illinois Multiple Sclerosis Res Collaborat, Urbana, IL USA
[6] Shepherd Ctr, Crawford Res Inst, Atlanta, GA USA