Fourteen contributions from international aging researchers and measurement specialists address a range of measurement issues involved in aging and physical activity research. Sample topics include the exercise dose-response effect, the measurement of quality of life, and the functional assessment of persons with disabilities. Several contributions focus on multicultural factors associated with the promotion of physical activity among elders. The editors are affiliated with the U. of Illinois at Urbana-Champaign. The volume (which lacks an index) contains papers originally presented at a 2003 symposium held there.