Australian Sullivan broke the world record for the 50m freestyle
Grant Stoelwinder, coach of Australian swimmer Eamon Sullivan, insists the spate of recent world records is not because of new swimsuit technology.
Swimming's world governing body Fina said it would review swimsuit design amid concerns about the growing influence of technology in the sport.
"It's the suit they always wore, with a bit of teflon on it," said Stoelwinder.
"People have to believe that this is an Olympic year and we would be expecting that this is going to happen."
Swimmers using the LZR Racer, Speedo's latest full-length body swimsuit, have been achieving records since the start of the year.
On Thursday, Australian Sullivan was the latest to set a new world record, smashing the 50m freestyle time set by Frenchman Alain Bernard with a time of 21.41 seconds.
But Stoelwinder believes these records are down to training and not technology.
"If this wasn't happening we would think there was something wrong, we are giving the suit more credit than we are the athletes," he stated.
And Fina executive director Cornel Marculsecu went along with Stoelwinder's claim.
Marculsecu thinks the improvements are down to "better preparation and training" rather than technological advancements in swimsuits.
"It is nothing new for swimmers to get better and better, it's been happening for the last 200 years," he added.
"Any time there is a world championships or an Olympic Games we have nine or 10 new world records.
"We are not seeing in swimming, like in other sports like skiing, a case where the materials are helping you get better."