Every single thing we know about how Shakira stays in shape

This is important for Shakira, Kaiser told Us Weekly. 'We focused on leaning out, strengthening her core, and boosting her booty—and then toning her arms like crazy,' she said.

'We alternate between strength and cardio intervals,' Kaiser told E! News. 'Some days we do just cardio and then strength and some days we start with strength and then do cardio, we like to mix it up.'

Shakira is huge on having goals for herself, Kaiser told E! News, and she's always working toward something.

Shakira wants to know what she's doing and why, Kaiser told W magazine. 'She's very smart and she wants to learn about the body and she wants to know why she’s doing what she’s doing and what her goal is, what she’s trying to accomplish,' she said. "And that’s why we’ve had such a long relationship, because she knows what a stickler I am for functional smart training, but I also make it really fun.'

Shakira's been known to do this full-body workout here and there when she's traveling.

Shakira doesn't just work out and hope for the best. Instead, Kaiser tells E! News that she's strategic and focuses on individual body parts and form.

'We started cracking down four months before she went on tour, building up her endurance so that she could sustain performing at that crazy level of energy for two hours,' Kaiser told Us Weekly. 'And bumping up her strength because she plays a lot of instruments, she’s dancing and she’s on and off stage through trap doors—so we needed to make sure that she was physically strong enough to endure all of that.'

'I want to make sure that she is improving her endurance so that she can go into a two-hour show and also has the strength and stamina to make it through a five-month tour,' Kaiser told E! News. 'It's about making sure she gets a little bit of everything.'

This is huge for her. Kaiser told E! News that when she and Shakira started working together, Shakira had some arthritis in her elbows and that her wrists were weak. Since then, they've done exercises to make sure they were making her stronger and more flexible.

Shakira's schedule is no joke—especially when she's on tour. That's why her health is a huge focus for her.

Sometimes, Shakira goes hard at the gym twice a day. 'She's doing two-a-days twice a week and the other three days she's doing one workout per day,' Kaiser told E! News.

Shakira has shared more than a few photos on Instagram of herself on the tennis court.

Getting a workout routine started isn't always easy, but Shakira is willing to put the work in upfront. 'Once you have a program and you get into the routine, it's much easier to keep going,' Kaiser told E! News.

Shakira will keep pushing regularly to make sure she's hitting her goals. 'It's really important to make sure you stay consistent. Even if that day it took longer to reach the goal she's aiming for, she still did it,' Kaiser told E! News.

Shakira is hypermobile, meaning her joints and tendons are super flexible. 'When you're hypermobile, it's easy to think your muscles are flexible but your flexibility is really around your joints and not your muscles,' Kaiser told E! News. 'Foam rolling is really important and making sure we are rolling out her fascia, her feet, her legs, and upper body to make sure she stays nice and healthy.'

Kaiser likes to make sure Shakira is eating throughout the day, with a focus on eating every two to three hours, she told E! News. That means two to three snacks in addition to breakfast, lunch, and dinner.

Shakira has protein 'in every meal,' Kaiser told E! News. She also has 'fresh veggies or small amounts of low glycemic fruit for snacks,' she added.

Cooking vegetables can be tricky and time-consuming, which is why Kaiser has Shakira do this, per W: Put fresh veggies in tinfoil with fish or another protein and cook it all together.