Usain Bolt’s 100m world record of 9.58 seconds has stood untouched for 16 years, but the sprint legend just admitted he could have gone even faster, per TheTimes. Faster than the greatest sprint ever run? That’s what Bolt believes , and science might back him up.

When Bolt stunned the world in Berlin in 2009, his Puma spikes had none of the advancements that dominate today’s sprinting landscape. No carbon plates, no super-charged foam, no bounce-enhancing design tweaks. His size 13 spikes carried a simple nylon plate with thin rubber covering the heel. Yet, he still blew away the field and etched his name into history. Expand Tweet

Speaking at a Puma event in Tokyo, Bolt didn’t hold back. “I probably would have run way faster if I had continued,” he said, noting that Shelly-Ann Fra

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