Overview

• The estimate comes from a Puma-commissioned analysis led by Wouter Hoogkamer at the University of Massachusetts that modeled modern carbon-plated spikes; the 21-page study using data from 15 athletes has not been published.
• Bolt said he has not tried the latest spikes and joked he did not want to risk a hamstring pull, while acknowledging the shoes appear to make athletes faster.
• He predicted Jamaicans Kishane Thompson and Oblique Seville should finish one-two in Sunday’s world 100m final, challenging defending champion Noah Lyles.
• Thompson owns this year’s world-leading 9.75, and Seville has beaten Lyles twice over 100m this season, strengthening Jamaica’s case.
• Bolt’s 100m and 200m world records from 2009 have stood for 16 years, with only Yohan Blake dipping under 9.70 and 19.30 since, which he says supports his view that the marks will not fall “at this present moment.”