Darryl Brooks/Alamy
I have just seen two people exercising together. She was running while he cycled beside her. She was only moving herself, but he was moving the bike too. Who expended more effort?
Tony Green
Ipswich, Suffolk, UK
A bicycle is a supremely efficient tool for converting muscle power into motion. So much so that while I can happily ride 130 or more kilometres, even a 1-kilometre run is utterly beyond me.
So, the runner is undoubtedly expending more effort than the cyclist in my view.
Peter Slessenger
Reading, Berkshire, UK
If level or downhill, the runner is definitely using more…
