“…As a result of the increasing numbers of elderly people with musculoskeletal disease in developed countries, including Japan (WHO Scientific Group, 2003), a variety of class-based exercise regimens have been proposed for older people to prevent falls (Inokuchi et al, 2007;Suzuki et al, 2004), control pain (Baker et al, 2001;Ettinger et al, 1997), and strengthen muscles in the extremities (Ades et al, 1996;Baker et al, 2001;McCartney et al, 1995). Several previous studies consistently showed that exercise interventions were effective on muscle strength, walking (speed or distance), and chair-rise performance for the elderly (Keysor and Jette, 2001; Latham et al, 2004;Rubenstein et al, 2000).…”