A lot of athletes at the very top level use things that provide, at most, a microscopic edge - because a microscopic edge can be quite significant with people t

A lot of athletes at the very top level use things that provide, at most, a microscopic edge - because a microscopic edge can be quite significant with people that close to their genetic potential, competing against comparable others. Take something like the buoyant body suits in swimming, which do genuinely provide enough of an advantage to have been banned. If a regular person wears one of those, it's not going to suddenly turn you into Michael Phelps. In all reality you would probably notice 0 difference in feel or results, but if you're doing laps with a delta time measured in the milliseconds, then yeah it can really make a difference. But for regular people engaged in regular sport, these differences don't matter and are not even generally observable. If anybody likes bowling there's an example there at basically every bowling alley where a guy shows up kitted out in hundreds of dollars of top brand professional gear, custom ball(s), and everything - and bowls a 120.