World records in sporting events have historically had as much to do with track composition and equipment improvements (e.g. pole vaulting from bamboo to aluminum to fiberglass and carbon fiber poles), better attire for less wind and water resistance, but also diet and scientific training techniques. Putting drugs aside, the frequency for setting records in events like the 100 meter will be less in the future. The 1,500 meter world record, for example, was set in 1999, 17 years ago. Genetics and economic opportunity will be more significant factors in advancing the 100 meter record beyond 28 mph. But not this year.