The researchers carried out further tests using some high-speed treadmills and analysed differing gaits- running forwards, backwards and even hopping! The results showed that from hopping we have higher ground forces acting on us than when in forward running (by over 30%), this shows we can handle and create greater forces than two-legged running at top speed. The research also found that even though speeds of forward and backward running obviously differed, minimum periods of foot ground contact were identical!
Therefore, we can essentially deduce that there is a physical limit to how fast muscle fibres can work to get our feet off the ground.
But still that doesn’t answer the question – when will sub 2 be broken for the marathon? Well as you know, we can never tell the exact time and date, but before Kipchoge’s stellar run last week this graph was a tracker of all marathon WRs over the years. The prediction is sub 2 won’t be broken until around 2025-2030 which looks plausible. However, if Kipchoge has anything to do with it that 100 seconds may vanish a lot quicker!