Breaking 30: climbing 1,000m in 30 minutes or less

In this Salomon Running video, viewers will see elite Swiss runner RĂ©mi Bonnet chase the elusive 30-minute barrier for a vertical kilometre

Running’s most intense hill workout: Kilian Jornet’s ridiculous one-hour challenge

Jornet shares his toughest training session: run a vertical kilometre followed by a flat 10K, all in less than an hour

VIDEO: Famous vertical kilometre race features climbs at 52 per cent grade

The vertical kilometre race in Fully, Switzerland was held for the 16th time today as runners and climbers took on the gruelling course.