While most runners will be wearing a little more than just knickers and a supportive bra, some of the Celebrate You team – which includes The Great British Sewing Bee’s Esme Young and author Giovanna Fletcher – will be wearing sports underwear to show that fitness is for everyone, whatever their shape.
Sezer says the event will be “incredible” and is a good chance for people to try running in a “safe space” without feeling intimidated.
“You don’t have to run. You can walk, skip, hop. For someone starting that journey it’s a really good stepping stone,” she told the Press Association.
Although tourists may be surprised to see women running in a sports bra and knickers during the bank holiday Monday race, Sezer said it is similar to what some elite female runners wear except “we have got a lot more body hanging out” and so it is considered “revealing”.
Sezer, 30, from west London, said she wore similar dresses to her peers when she was younger but got more attention because her breasts and bum were larger.
She said exercise makes her calm, clears her head and energises her but she does not do it to try to lose weight and suggests that should not be anyone’s main reason for running.
“Why are you doing this? If losing weight is to fit in with what society thinks you should look like then who cares?”
Jada Sezer at the Kong: Skull Island European premiere at Cineworld Leicester Square, London (Chris Ratcliffe/PA)
Sezer said she is thankful to social media for giving her a career and “a voice” and believes it can be a good tool for teaching young people that everyone is different.
“With social media you can see a better range. People are braver. They are able to find their tribe with a hashtag.
“If you don’t see it, how do you know to be it?”
But she regularly takes a break from social media, goes on “unfollow sprees” or temporarily deletes apps to break the habit.
She suggests others limit the time they spend looking at other people’s perfect looking lives on “aspirational” apps like Instagram where “it seems like everyone is wealthy and happily married with clean, well behaved children”.