Jessica Ennis-Hill is targeting a defence of her Olympic heptathlon title in Rio de Janeiro in 2016 as she returns to the sport following the birth of her first child in July.
Ennis-Hill, 28, who won gold at London 2012, resumed training last month and plans to start competing next summer.
She told BBC Sport: "The focus has shifted but I am still very determined and focused on my athletics.
"It's about training, putting the work in and seeing if I can get to Rio."
Sheffield-based Ennis-Hill described herself as a mum "first and foremost" to son Reggie.
But the former World and European heptathlon champion believes she can juggle commitments to continue to compete at the highest level.
Ennis-Hill added: "I am still the same person. I am still very driven and focused and determined and I want to come back and see if I can do both.
"Rio is the main focus and it's about building back into training. It's kind of the unknown. I'm not sure where I am going to be in relation to where I was last year or the year before.
"I know it will be an incredibly hard challenge and I am going to have to put a lot of time and work into it.
"But I believe with the people around me and a fantastic coach in Toni (Minichiello) we can definitely get there."