1,851km Zwift session rider says he lost 5% of his body weight and damaged his organs

Dr Alex Stavrinides tells the (frankly harrowing) story of his 1,851km Zwift ride in which he 'buried myself deeper than I thought I would or could'

Zwift record attempt
Stavrinides with 35 hours' riding done
(Image credit: Alex Stavrinides)

Turning 40 for most of us might mean a weekend city break, throwing a party or hiring a hot tub. Not for ultra-cyclist Dr Alex Stavrinides – he rode 1,851km on Zwift, in a single ride.

The Audax aficionado has since told the full story of that experience on his Test Subject 1 blog, describing how he lost 5% of his body mass and sustained mild organ damage.

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After cutting his teeth on local and national newspapers, James began at Cycling Weekly as a sub-editor in 2000 when the current office was literally all fields. 

Eventually becoming chief sub-editor, in 2016 he switched to the job of full-time writer, and covers news, racing and features.

A lifelong cyclist and cycling fan, James's racing days (and most of his fitness) are now behind him. But he still rides regularly, both on the road and on the gravelly stuff.