No side effects or safety failures occurred from the
exercise intervention. In the early stage of exercise intervention,
3 patients had difficulty performing the exercises
because of weakness in physical strength and back
pain. The posture was altered (lordosis or kyphosis) because
of aging, which led to severe pain in the back and
pelvis. Accordingly, flexibility training was performed to
improve posture and joint mobility. After the first 4-week
adaptation period, the exercise intervention could be
performed without giving up.