What can an Olympian Commonwealth Games champion – and the most successful CrossFit Games competitor of all time teach you about fitness? Quite a lot, it turns out, finds Harry Bullmore M ost people wouldn’t mind being a little bit fitter . But the fittest? That seems unreachable. However, many argue that all-conquering CrossFit athlete Tia-Clair Toomey is, by objective measures, the fittest woman in history. Toomey, who is an ambassador for the fitness app Pliability , has won the CrossFit