Supermodel Niki Taylor is swapping high heels for sneakers this summer (13) to train for a triathlon. The blonde beauty, 38, is preparing to put her endurance skills to the test by engaging in the swimming, cycling and running challenge, which will take place this autumn (13). The mother of four, whose youngest child, son Rex, is 17 months old, tells People.com, "I can't sit still. I have to be super busy. I figured I can run and bike pretty well, but I need to learn how to swim rapidly. I am going to work on that and am excited about adding the triathlon dimension to my life."