Coti de Gran Hermano in Bathing Suit Ask "Siesta?"

It's hard work modeling bathing suits. Just ask Constanza Romero. The Gran Hermano star shared pictures of herself posing on a bed, wearing a black two-piece swimsuit. "Siesta?" she captioned the post. How does she stay so fit? Read on to see 5 ways Hermano stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bathing Suit Photos!

Romero enjoys the sun and sand at the beach. Hitting the beach is not just fun—research shows access to blue spaces can have a positive impact on mental health. "Simply staring out to sea can change the frequency of our brain waves and lure us into a mild meditative state," according to Sea Sanctuary.

Romero loves spending time in the pool. Research shows swimming is a good choice for low-impact exercise. "Recreational swimming will burn about the same calories as brisk walking," says Dr. I-Min Lee, a professor of medicine at Harvard Medical School.

Romero plays basketball, which is a great team sport. "For some of us, playing group sports can be an appealing way to remain active," says Felipe Lobelo, MD, PhD, FAHA. "Broader implementation of programs using group sports as a vehicle to deliver lifestyle change can help reduce the growing burden of physical inactivity."

Romero enjoys cold iced beverages. Research shows cold drinks can help burn more calories than room temperature liquids. "I calculated it, and for every ounce of ice that you eat, it takes five calories to melt it and bring it up to body temperature," says Brian Weiner, MD.

Romero loves spending time with dogs, which experts say can positively impact mental health. "Pet ownership has many possible mental health benefits," says Katherine Ponte, JD, MBA, CPRP. "It has been shown to reduce stress, depression and anxiety and improve overall quality of life in many ways."