No one has bettered Usain Bolt’s 100 metres world record of 9. ... if a high-performance running track developed by Feldspar Sport – a UK-based technology company founded by Hongkonger Alvina ...

Feldspar founder and chief executive Alvina Chen told The Telegraph: "We see how running shoes have evolved ... nine seconds doesn’t seem crazy." Bolt set his 100m world record at the 2009 ...

Enertor will have you race-ready in no time. Trusted by top athletes Usain Bolt and Vivian Cheruiyot, the brand's running insoles are designed to help you train harder and recover faster.