Body image expert Natasha Devon said Rebecca Adlington's tears over her body insecurities and Twitter abuse shows that society is "still judging people by how they look first and foremost".
Ms Devon told Daybreak: "When we hosted the 2012 Olympics and people started talking about our bodies being there to achieve first and foremost instead of look a certain way, I really thought as a society that might have been a turning point.
"But what has happened with Rebecca Adlington and the appalling way she has been trolled online shows that actually we are still judging people by how they look first and foremost.
"Rebecca Adlington is a medal-winning athlete, she has an amazing body that is capable of incredible things - that shouldn't be diminished because she's in there with somebody whose body does something different".
More top news
David Davis is hoping to push Brexit withdrawal talks towards discussions on a future trading relationship between the UK and EU.
A fine start to Sunday but rain moves in from the southwest later on.
A second police officer has died after he and a colleague were shot as they scuffled with a suspect in Florida.