Nastia Liukin shared one of the reasons why she has been glowing from the inside out. The ex-Olympian took to Instagram to proudly make her new relationship public, posting sweet photos from their romantic vacation.
Read on to learn about the activities that help her stay in shape, as well as the photographs that prove they work—and don't forget to check out the 30 Top Celebrity Swimsuit Moments to become beach-ready too!