Here are some helpful links:

• American Physical Therapy Association
• American College of Sports Medicine
• American Medical Association
• National Institute on Aging
• Centers for Medicare & Medicaid Services
• WebMD
• American Senior Fitness Association
• MEDLINEplus
• American Academy of Orthopaedic Surgeons
• American Massage Therapy Association
• National Athletic Trainers' Association
• Arthritis Foundation
• Pilates Certification Center