How can she be 66? Denise Austin flashes her abs in a bikini top as she reveals the ‘core workouts’ that earn her that taut tummy

Workout guru Denise Austin has shared a new image to Instagram that highlights her toned tummy.

The 66-year-old siren looked youthful in a blue-and-black bikini top paired with small black shorts as she posed in an outdoor setting in the hills.

The workout guru – who spoke to DailyMail.com last year about her figure – added black sunglasses as she had her blonde hair down over her shoulders.

In her caption the exercise fanatic told followers that they can access her top tips for keeping a taut tummy over 50 when menopause kicks in.

‘A brand new challenge to focus on your ABS!!’ began her caption.

‘If you’re wondering how to get a flatter stomach and what exercises are best than this challenge is for you! 7 days of core workouts, recipes and lifestyle tips to help you achieve that stomach you have always wanted.’

She added, ‘And just in time for the warmer months since Spring is right around the corner! 

‘The challenge begins March 13th… if you don’t have a DeniseAustin membership you can join for a 30-day free trial!’

In December the 1980s workout guru shared three exercise routines perfect for at home with Prevention.

The moves focus on strength training with hand weights. She called it ‘three, easy fat-burning moves’ to help keep you moving and elevate your heart rate at any age. 

‘If you’re looking for ways to burn fat fast, give these three fat-burning moves a try!’ she said.

‘They’ll get your heart rate up, they’re easy to incorporate into any routine and the best part is [you] don’t need any equipment or much space to do them!! You got this!’

Last year the svelte star has told DailyMail.com that one of the ways to maintain a flat belly during the holidays it to skip ‘sugar substitutes.’ 

Stay clean: Last year the svelte star has told DailyMail.com that one of the ways to maintain a flat belly during the holidays it to skip ‘sugar substitutes.’ That means saying no to diet sodas and processed sweets that claim to be zero sugar

That means saying no to diet sodas and processed sweets that claim to be zero sugar.

This come just as the blonde shared a new image of herself in a yellow crop top that made the most of her tiny waistline.

‘I have some tips that can help ease that feeling and keep your bloated belly at bay. Some are as simple as eating slower and to steer clear of sugar substitutes,’ she said.

The star went into more detail on her blog web.deniseaustin.com. She said that women over 50 need to try different foods. Foods high in fiber are a must, she noted.

‘Our 50s is when staying regular can become a challenge, so in addition to fiber-rich whole grains, begin to incorporate other fiber-rich foods such as beans and legumes, broccoli, berries and avocados,’ she wrote on her blog.

Easy plan: ‘I have some tips that can help ease that feeling and keep your bloated belly at bay. Some are as simple as eating slower and to steer clear of sugar substitutes,’ she said 

She also recommends inflammation-fighting foods. ‘Help minimize inflammation with the addition of turmeric, salmon, olive oil and even dark chocolate… these foods can also help to promote heart health and a healthy weight, when eaten in moderation!’

And her last tip is to consume plant-based protein. ‘To help keep your heart healthy, at this point in your life you may want to begin to substitute in plant-based protein for animal protein, such as red meat. Consider a meat-free bean chili, tossing lentils into your salads, or fajitas with tofu instead of steak.’

As far as food, she told DailyMail.com she watches what she eats but keeps it delicious. And her portions are just right for shedding the pounds.

Take note! She also recommends inflammation-fighting foods. ‘Help minimize inflammation with the addition of turmeric, salmon, olive oil and even dark chocolate… these foods can also help to promote heart health and a healthy weight, when eaten in moderation’

Still a hottie: Austin looked youthful in the small orange bikini top paired with small briefs as she added a white jacket while wearing her hair down

‘I eat smaller portions,’ Denise told DailyMail.com. ‘For dinner I may have salmon and veggies. A snack is flax seed with yogurt. I love avocadoes and eggs for breakfast.

‘I cook really healthy for my family. There are a lot of salads, chicken tacos, vegetable lasagnas, casseroles with less cheese.’ 

But she is not always careful: ‘I eat well 80 percent of the time and the other 20 percent I am bad.’

She is referring to the popular 80/20 diet method which allows for cheat days. Some of the things she loves to cheat with: carbs and sugar. 

And she also talked working out.         

The exercise proponent’s answer to battling the bulge is by taking baby steps.

Still a stunner: And her last tip is to consume plant-based protein. ‘To help keep your heart healthy, at this point in your life you may want to begin to substitute in plant-based protein for animal protein, such as red meat. Consider a meat-free bean chili, tossing lentils into your salads, or fajitas with tofu instead of steak’; seen in the 1980s

‘I have been doing this for 40 years and am not a fitness nut,’ she clarifies straight away during the interview. ‘But I am consistent.’

That means working out every day in some form.

‘If you can do 10 minutes of working out at a time and do that three times a day, you will have worked out 30 minutes in one day,’ noted the star.

And she added that it is important to keep moving all day long: ‘It is all about blood circulation and moving. I even stand up and walk in place when I watch TV just to keep it flowing.’

Sounds like smart math, and an easy way to lean into exercising.

‘The consistency pays off,’ added the affable pinup who is very active on Instagram.