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Blaming carbs is an interesting (the British meaning of the word) theory. Look at East African long distance runners who practically live on carbs in the shape of teff, ugali and cups of tea spiced with 1dl of sugar. They train extreme hours at an effort which is miles higher than any TT player and yet can have very long careers (stepping down from track to road/marathon later in their careers). Just have a look at Lagat and Keflezigi in the US who are doing “pretty” well way into their 40ies fueled on East African diets.
On top of that, some people process carbs better than others. I know the KETO diet and zerocarb are gaining popularity quite a lot as of late, and so the BAD CARB philosophy is getting stronger. Though to say there is substantial evidence one way or the other is a falsity. What you might say, with some real anecdotal/scientific evidence, is that the processed carbs and junk food is bad for the body -- but good for the tongue!