TV presenters Matt Johnson and Anna Williamson, plus DJ Nick Bright and Olympian Donna Fraser offer mentoring via email and social media.
More than 5,000 people have already signed up to the campaign, which runs until 25 August.
Johnson – a Mind ambassador who has spoken publicly about his own battle with depression, external – said: “It brings together mental and physical wellbeing, two things that have a big personal meaning for me.
“The challenges we face in our lives are all different – and so are our minds and our bodies. But what we do know is that being active, in a way that works for you, can help reduce the risk of depression by up to 30%.
“It’s all about looking after your body and your mind.”