He invented it... not the NHS by the way.
Note: there are some C25K plans (US-based) that go by distance, not time.
More here:
bigmedium.com/ideas/bbc-how...
bbc.co.uk/news/av/stories-4...
Silly Josh! 
Why "Couch to 5k"? - ask JOSH CLARK! - Couch to 5K
Why "Couch to 5k"? - ask JOSH CLARK!
Written by
John_W
Graduate
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