How to build muscle as age tears it downBy Dr. Melina B. Jampolis, CNNUpdated 0912 GMT (1712 HKT) March 6, 2018 Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds. Photos: Fitness myth or fact?Fitness: Myths vs. facts – Bad advice and outdated research could be putting a kink in your workout efforts. Here are some fitness myths that have proved to be just that. Hide Caption 1 of 10 Photos: Fitness myth or fact?