I Tried the Goop That Makes You Run Faster (But Possibly Poop Yourself). It Worked.

Elite runners are slurping this gray sludge before races. There’s a scientific reason.

‘I tried the goop that makes you run faster (but possibly recks your tummy) – here’s what it did to my race’

Elite runners are slurping this grey sludge before competitions – and there’s a scientific reason for it ...