Increase Program Participation With Pickleball (Aug 26, 2009 By Barbara Wintroub, ) Active-aging professionals are always looking for ways to increase both the physical activity levels of their members or residents and the amount of people who participate in their programs. Pickleball, “the fastest-growing sport in North America,” is an activity that can help attract and retain participants. In fact, this sport for all ages is increasingly popular with older adults.