The 49-year-old was pictured looking toned while standing beside her holiday pool and wrote an inspirational message for her followers: "In my 'casually leaning against a pillar' pose. I'm posting all these pics of myself scantily dressed because I want to show you that working out works.
"Contrary to popular belief I don't work out with @edthept every day... on other days I'll train at home.. to myself. Have done for years. If you are nervous, don't be... just start... 10 min workouts... do what you can... build up gradually. That's what I did. I don't train all day...I've got a job , and a family... it's about balance.
"Yes, I want you to buy my DVD .... because it will change your life... working out has changed mine.... #never2old4abikini #30dayfatburn #neverthoughtidbepostingpicsofmyselfinakiniandfeelproud !!!"
Davina's fans took to the photo sharing app to praise her hard work, with one writing: "Body goals for 2017, @davinalpmccall you are amazing, you show us busy mums that it's possible".
Another wrote: "Amazing! I am 40 next year and have said I want a body like yours strong and lean and healthy I am halfway there #40goals".
Enjoy a stay in the historic home of screen legend Elizabeth Taylor. The stunning property sleeps up to eight people and features both a pool and a spa, not to mention stunning views.
Price per person, per week: £372
Where? Welcombe, Devon
The six bedroom house is filled with plenty of bits and pieces made by the TV personality herself. The property sleeps up to 14 people and boasts a luxurious kitchen fit with an aga, a cosy living room and a number of log fires.
Price per person, per week: £248
Where? Parrot Cay, Turks and Caicos
This home is part of the Parrot Cay resorts and has three bedrooms, sleeping six people. The property benefits from guest services and on-site acitivites for guests. The house also has a stunning 45-foot long infinity pool and a beachside fire pit.
Price per person, per week: £4,544
Where? Stargroves, Mustique, Saint Vincent
Live the life of a rockstar in this six bedroom, Japanese style beachfront villa previously owned by Rolling Stones frontman Mick Jagger. The property is made up of six pavilions and sleeps up to 10 people.
Price per person, per week: £1,244
Where? Harbor Island, San Diego, USA
Tucked away between the Sheraton San Diego Hotel and the Hilton, the 46 foot motor yacht was chartered by chart toppers, One Direction. The yacht boasts two bedrooms, two bathrooms and a fully equipped kitchen.
Price per person, per week: £144
Where? Hollywood Hills, Los Angeles, USA
This estate, perched above Sunset Boulevard, was once owned by Orson Wells and has space to sleep eight people. Wells isn't the only one to live at this property, other celebs include: Frank Sinatra, Barbara Streisand and David Bowie.
Price per person, per week: £455
Where? British Virgin Islands
Described as Branson's 'home away from home', this Caribbean island has accommodation that can sleep up to 30 guests. With a wide range of activities on offer, you won't be short of things to do.
Price per person, per week: £9,928
Where? Florence, Italy
This stunning 16th century villa features a large swimming pool, tennis court and even a lake for swimming. The estate, which can sleep up to 50 guests, is also available for hire for weddings, corporate events and holiday rentals.
Price per person, per week: £183
Where? Accord, New York, USA
This unusual house was once owned by Willem Defoe and it perfect for a creative retreat. The property boasts views of the private meadows and woods and sleeps up to four guests. The house also features a vaulted glass chef's kitchen, a writer's tower and floor to ceiling windows.
Price per person, per week: £586
Where? La Quinta, California, USA
This 39-acre, 13 bedroom equestrian compound can sleep up to 20 people and is set against the Santa Rosa Mountains. You'll have access to an infinity pool and private pond for paddle boating.