Zara Phillips has spoken of her struggle to get fit again after months out of the saddle while she was having her first child.
The Olympic medal winner and Queen's granddaughter gave birth to daughter Mia in Gloucestershire in January, and said she got on a horse for the first time afterwards five weeks later.
She says it was hard trying to get each muscle group to remember what they used to do.
The Queen's grand daughter says she's delighted to be back in major competition for the first time since the birth of her daughter Mia.
Zara Phillips, who lives with her husband Mike Tindall in Gloucestershire, has been selected in the Team GB squad for the World Equestrian Games in August.
The Queen's grand daughter, Zara Phillips, who lives in Gloucestershire, is to return to major competition for the first time since the birth of her daughter Mia at the World Equestrian Games in Normandy in August.
She has been named in a six-strong Great Britain squad which also includes Pippa Funnell, William Fox-Pitt, Tina Cook, Izzy Taylor and Oliver Townend.
Phillips was crowned world eventing champion in Aachen in 2006 and won team silver at London 2012 alongside Cook and Fox-Pitt, where she was presented with her medal by her mother, the Princess Royal.
More than 150 thousand people are expected at Badminton Park Estate in Gloucestershire this weekend for the annual horse trials.
The three day event is one of the most prestigious in the world. The trials were cancelled last year due to poor weather.
This year the competition is tougher than ever with Olympic Gold, Silver and Bronze medallists taking part.
Emma Walden meets Zara Phillips, who is training hard for the Olympics. She missed the last two games because her horse was injured but both her mother the Princess Royal and her father Capt Mark Phillips have competed in the past.
Zara Phillips has been selected for the British equestrian Olympic team.
She'll be following in the footsteps of her mother Princess Anne and her father Mark Phillips,who were both involved in previous Olympic games.
Nearly a quarter of a million people are expected to attend the four-day festival, which finishes on Friday with the Gold Cup.