Jacinda Ardern said she “slept well for the first time in a long” after announcing she was stepping down as prime minister.
The New Zealand leader announced she was resigning from the role on Thursday telling reporters she had “nothing left in the tank”.
Ms Ardern said: “I’ll have to admit I slept well for the first time in a long time last night. But yes… still a range of emotions. So of course I feel, you know sad, but also I do have sense of relief.
“I actually feel deeply humbled by the response that I’ve received. To have those messages of gratitude has been really moving for me and for my family.
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“I’ll go home for a little bit and just pack, get ready for a bit of time in Wellington. Focus for the team obviously is on selecting a new leader of the Labour Party and therefore a new prime minister for New Zealand.
“It’s an incredibly important decision and the team is very, very focused.”
Ms Ardern has received widespread praise from leaders around the world after announcing she would be stepping down but has faced mounting political pressures at home in recent months.
Her Labour party has been struggling in the polls, with a Taxpayers Union-Curia poll released on Friday using data before Ms Ardern stepped down saw the party’s popularity fall to 31.7%, down from 1.4% last month, with the opposition New Zealand National Party on 37.2%.
Nevertheless, Ms Ardern’s announcement that 7 February would be her last day as prime minister after five and a half years in office came as a shock to the nation of five million people own.
Asked if misogyny played a role in her decision to leave, Ms Ardern said: “No, it did not, and my strong message to women in leadership, and girls who may be considering leadership in the future is: This is a place where foundations have been laid long before me to make it possible for us to be in these roles in a way that in the past it just wasn’t in the same way.
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“You can have a family and be in these roles, you can lead in your own style. Is there more work to do? Yes, but that was not the cause for my departure.”
Lawmakers in her Labour Party will vote for a new leader on Sunday.
If no candidate gets at least two-thirds support from the caucus, then the leadership contest will go to the wider party membership.
Ms Ardern has recommended the party chose her replacement by the time she steps down.
The next general election in New Zealand is scheduled for 14 October.