Croatian soccer star Ana Maria Marković is having a fun summer at the Laganini Beach Club on Ciovo Island, Croatia. Marković, 23, shared pictures of herself relaxing on a sun lounger in a pink bathing suit, enjoying a matching pink cocktail. "Summer in pink 👙☀️," she captioned the post.  How does she stay so fit? Read on to see 5 ways Marković 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!

Marković posts videos of her training sessions, which frequently include running on the treadmill. "Many dedicated long-term runners do not run because they want to live longer," says cardiologist Dr. Aaron Baggish, the associate director of the Cardiovascular Performance Program at Harvard-affiliated Massachusetts General Hospital. "They run because it makes them feel better on a daily basis. There is a mood elevating, quality-of-life benefit that comes from being a regular exerciser."

Marković's career as a soccer player means that by simply doing her job, she gets an incredible workout every time. "It is a game of continuous running and with very little stopping," says Mercedes Carnethon, PhD. "It also has anaerobic elements – that high intensity where you're sprinting and then resting – you're constantly moving."

Marković has been training as an athlete since she was 14 years old. "I started playing because of the motivation I felt when I saw that women's football was growing more and more," she says. "Also because of the motivation generated by watching some men's football matches, especially when Cristiano Ronaldo was playing, obviously. I played in some little-known amateur clubs. At first it started as a form of a hobby, but then thanks to all the support I received from my family and my environment, I was improving. I was always a forward, it was what I liked the most – scoring goals."

Marković enjoys fresh coconut water, which is a great alternative to many supermarket sports drinks. "Coconut water is popular for rehydration after exercise or during mild illness," says Katherine Zeratsky, RD, LD. "It's true that coconut water has electrolytes, such as potassium, sodium and manganese. The amounts vary by brand."

Marković has clear-cut goals, which research shows is beneficial for mental health. "My goal always year after year is to be able to compete to win the league and all the trophies that are within our reach," she says. "The same with Croatia, always being able to give my best both for my club and for my national team and thus be able to win collective titles, which are the ones I give the most importance to."df44d9eab23ea271ddde7545ae2c09ec