Hello Health Group និង “Hello គ្រូពេទ្យ” មិនចេញវេជ្ជបញ្ជា មិនធ្វើរោគវិនិច្ឆ័យ ឬព្យាបាលជូនទេ៕
Fitness for Life. http://www.webmd.com/healthy-aging/features/keep-exercising?page=3. Accessed January 26, 2017.
Exercise & Physical Activity: Your Everyday Guide from the National Institute on Aging. https://www.nia.nih.gov/health/publication/exercise-physical-activity/introduction. Accessed January 26, 2017.
Exercise for Seniors. https://medlineplus.gov/exerciseforseniors.html. Accessed January 26, 2017.