Did you guys consider swimming?

Did you guys consider swimming? My parents always tell me that according to scientists in our country of birth swimming might be an effective way in decreasing stuttering. I actually did swimming for 6 months to get a swimming diploma so not for experimenting and after those 6 months my stuttering did decrease although I picked up kickboxing soon afterwards so I don't really know whether my decrease in stuttering correlated with swimming or kickboxing. Do you guys know more about the connection between swimming and battling stuttering?