Nina Dobrev wears bikini as she runs on beach in Mexico

Nina Dobrev sure isn’t lazy when it comes to her workout routine.

The Vampire Diaries star still gets in a grueling sweat session even when on a dreamy vacation South of the border.

On Wednesday the brunette bombshell looked like Bo Derek from the movie 10 when she jogged on the beach in Tulum. This comes after the looker did sit-ups in the sand.

Glow for it: Nina Dobrev sure isn’t lazy when it comes to her workout routine. The Vampire Diaries star still gets in a grueling sweat session even when on a dreamy vacation South of the border

On Wednesday the brunette bombshell looked like Bo Derek from the movie 10 when she jogged on the beach in Tulum

On Wednesday the brunette bombshell looked like Bo Derek from the movie 10 when she jogged on the beach in Tulum

Inviting: On Wednesday the brunette bombshell looked like Bo Derek from the movie 10 when she jogged on the beach in Tulum

It’s not easy to work out in 90 degree weather, but Nina made it look easy.

Dobrev made the most of a skimpy black string bikini during her exercise-filled afternoon.

She was toned head to toe and was showing off a golden, even tan.

The star has been in Tulum – a town on the Caribbean coastline of Mexico’s Yucatán Peninsula known for its beaches and well-preserved ruins of an ancient Mayan – for several days.

Ambitious: It's not easy to work out in 90 degree weather, but Nina made it look easy

Ambitious: It’s not easy to work out in 90 degree weather, but Nina made it look easy

Checking her Instagram account? The siren was also seen showing her two pretty friends her cell phone

Checking her Instagram account? The siren was also seen showing her two pretty friends her cell phone

Earlier this week the TV star wore a light blue two-piece as she posed by a beach with the caption: ‘Namaste in the cold. This beach doesn’t believe in winter.’

The image looked primed for the cover of Shape magazine.

This comes after she campaigned against the barbaric shark fin trade in a video for Oceana.  

Now on to knee lifts: Nina also worked with a male trainer who wore orange shorts

Now on to knee lifts: Nina also worked with a male trainer who wore orange shorts

She also did sit ups

She looked to be in pain during the exercise

Now for the hard stuff: Dobrev also did intense sit ups that looked painful

The Flatliners actress matched the water and sky by wearing a bright blue Kacey | Shana two-piece bathing suit as she danced on the beach-side rocks.

Dobrev waved her arms up and down and moved her hips while smiling wide for the camera.

The Canadian actress wore large sunglasses as the wind blew in her hair.

This can't be fun: She also lifted her legs and arms to work her tummy muscles

This can’t be fun: She also lifted her legs and arms to work her tummy muscles

From the looks of it, blue seems to be Dobrev’s favourite color, as she recently posted a different video where she also wore blue in the water.

The Bulgarian-born star swam alongside sharks in a bid to stop the barbaric trade of their fins.

The former Vampire Diaries star fearlessly tailed the predators — some almost as big as her — in a PSA for Oceana. 

Blue winter: Dobrev flaunted her bikini body in an Instagram video shared Sunday

Blue winter: Dobrev flaunted her bikini body in an Instagram video shared Sunday

Keeping cool in the cold: Despite it being winter, the 29-year-old shared that 'This beach doesn't believe in winter'

Keeping cool in the cold: Despite it being winter, the 29-year-old shared that 'This beach doesn't believe in winter'

Keeping cool in the cold: Despite it being winter, the 29-year-old shared that ‘This beach doesn’t believe in winter’

‘I used to be scared… but then I learned the facts,’ she said in the video, waist-deep in the shark infested waters.

‘Sharks keep the ocean healthy. And they aren’t really interested in us.’

She added: ‘It’s our interest in their fins that’s scary.’

Brave: Dobrev swam alongside SHARKS in a bid to stop the barbaric trade of their fins

Brave: Dobrev swam alongside SHARKS in a bid to stop the barbaric trade of their fins

Not bothered: 'Sharks keep the ocean healthy. And they aren't really interested in us.'

Not bothered: ‘Sharks keep the ocean healthy. And they aren’t really interested in us.’

Real horror story: She adds: 'It's our interest in their fins that's scary.'

Real horror story: She adds: ‘It’s our interest in their fins that’s scary.’

The film cut to a harrowing shot of a harbour completely carpeted in severed shark fins, and another covered in shark tails that have been hacked off.

‘Millions of sharks end up in the global fin trade every year,’ Nina reported. ‘And many grow slowly, which means they face a high risk of extinction.

She plead: ‘Please help, and join me and Oceana in the campaign to stop the trade of shark fins and help save sharks.’

Barbaric: The film cuts to a harrowing shot of a harbour completely carpeted in severed shark fins

Barbaric: The film cuts to a harrowing shot of a harbour completely carpeted in severed shark fins

Loophole: While shark finning is illegal in U.S. waters, shark fins ¿ including imports from countries that allow finning ¿ continue to be bought and sold throughout the US, Oceana reports

Loophole: While shark finning is illegal in U.S. waters, shark fins – including imports from countries that allow finning – continue to be bought and sold throughout the US, Oceana reports

While shark finning is illegal in U.S. waters, shark fins – including imports from countries that allow finning – continue to be bought and sold throughout the US, Oceana reports.

Oceana claims that the demand for shark fins is one of the greatest threats facing shark populations around the world.

Shark hunters have been known to fin the sharks alive, throwing them back in the water with no means of swimming, hunting or surviving at all.

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