a third time. 1900, 192k, and now 202a. a century on, things have certainly changed and we re notjust talking about the outfits. every time there s an olympic games, it s a chance for notjust sport, but sport tech to take to the world stage. and we re always learning about new ways to monitor how exercise and sport affects the human body. and what s trialled here at elite level will almost certainly trickle down to the rest of us ordinaries at some point. so first, let s hit the pool where alasdair keene is checking out something very snug indeed. i knew it from a very young age that s where i want to be. the olympics is just amazing to go to as a whole, but obviously, it s taken me about four years to do so, so i m so happy to finally have made that progression. alasdair: getting to this point takes determination, lots of training, and the best technology. there s a piece of equipment that all swimmers have that s tightly regulated, and designers are constantly trying