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Most cyclists have blown up – also known as bonking or getting ‘the knock’ or ‘the hunger knock’ – at some point during our cycling career and this video, below, explores precisely how and why it happens.
For his latest challenge, Conor Dunne has decided to ride for hours until he bonks; to test how long it takes him to blow his lights and also to explore what exactly is happening to his body when the warning lights come on and the head gasket eventually blows.
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This is an interesting film in that it compares Dunne's performance - by looking at his data and blood - with his GCN colleague James Lowsley-Williams, also known as 'Hank'.
In this video Dunne and ‘Hank’ take on a 140km rider though the Brecon Beacons in south Wales to their base in Bath. The challenge involves Dunne going without food but Hank taking on his usual level of fuel when he’s out on the bike.
As they go they compare the divergence in their performance and blood glucose levels as Dunne gradually rides himself gradually into the ground.
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