How to build muscle as age tears it down

By Dr. Melina B. Jampolis, CNN

Updated 0912 GMT (1712 HKT) March 6, 2018

Bad advice and outdated research could be putting a kink in your workout efforts.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.
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Fitness: Myths vs. facts – Bad advice and outdated research could be putting a kink in your workout efforts.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.
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Crunches do tone a small portion of your abs, but you may get better results from moves engaging your entire core.
Photos: Fitness myth or fact?
Fitness: Myths vs. facts – Crunches do tone a small portion of your abs, but you may get better results from moves engaging your entire core.
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Sweating doesn't equate to calories burned. It might be the result of a hot room, the weather or your physiology.