Antonella Ríos in Bathing Suit Wears "the Light Blue"

Chilean actress Antonella Ríos is showing off the results of the hard work and discipline it takes to always be camera-ready. Ríos posted a photo of herself wearing a blue and pink bathing suit as she posed in front of a mirror, with the caption “The light blue 💦.” How does she stay so fit? Read on to see 5 ways Ríos 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!

1. Mountain Climbers

Ríos does several reps of mountain climbers as part of her workout routine. "It's good for your lungs, heart, and so many bigger muscle groups in your body," says personal trainer Ashley Joi. "It's a very beneficial exercise that people should incorporate more into home workouts, bodyweight workouts, and warm-ups." Mountain climbers are a great cardiovascular and full-body exercise that can be done almost anywhere. Here's how to do them:

1. Start in a plank position with your hands placed shoulder-width apart on the ground. Your body should be straight and your feet should be together.
2. Lift your right foot and bring your knee towards your chest. At the same time, straighten your left leg behind you.
3. Quickly switch your legs and bring your left knee towards your chest while straightening your right leg behind you.
4. Continue alternating your legs, bringing each knee towards your chest as quickly as you can while keeping your core engaged and your body straight.
5. If you're just starting out, aim for 10-20 mountain climbers. As you get more comfortable, you can increase the number of mountain climbers you do in a set.

Remember to keep your core engaged and your body straight throughout the exercise. If you need to, you can drop to your knees to make the exercise easier, but try to work up to doing them on your toes as this will challenge your core more.

2. Bicycle Crunches

Ríos is a big fan of bicycle crunches as part of her routine. “Bicycle crunches can help tone your midsection and slim your waist,” says personal trainer Stephanie Mansour. “Because bicycle crunches require more leg movement than standard crunches, they’re also great for improving stability, flexibility and coordination.”

3. Squats

Ríos never skips her squats. “Mobility isn’t just about your range of motion but how strong you are in specific ranges of motion. squats improve your ability to, well, squat,” says certified strength and conditioning specialist Jake Boly. “Repeatedly performing squats train your joints to move through Squats through multiple planes of motion. And adding weight to your squats over time will result in strength at both the bottom and top of a squat. That newfound squat strength carries over everyday life.”

4. Russian Twists

Ríos likes amping up her ab workouts with Russian twists. "The Russian twist targets all the muscles in your core, making it a great abs exercise when you’re tight on time," says Peter Donohoe, NASM-certified personal trainer, core strength teacher at the Boston Ballet.

5. Sit Ups

Ríos incorporates sit ups into her exercise routine. “I love doing sit-ups when I have a table to anchor my feet on or a workout buddy holding my feet down with their hands,” says Olivia Amato, CPT. “This usually ensures proper form because you don't have to worry about keeping your feet on the ground on top of everything else.”