I'm talking about doing at least a week of just time trials - 1 with cheater shoes/spikes, take a day of rest, 1 without then repeat compute the average times and do a t-test- in order to see the difference these shoes truly make. You could conduct several of these experiments by yourself, or get more people to do it with you in order to increase statistical power. There's all this debate going on, why hasn't anyone just done the freaking experiment and reported the results? If I could afford to buy Dragonflies at the moment I would do it.