ASC1951 said:If you are a performance athlete doing a 3 day event where minutes will count, maybe. Otherwise - pointless, just eat a normal healthy diet.
jimboalee said:I've banged in some numbers to represent Shades, and he will spend 8 1/2 hours getting from Rosslare to Wicklow. Saturday??
With the ambient temp at 3 deg C and the wind in the NW at 24 mph, against his NNE direction of travel, Shades will require almost 4000 kCals AND his BMR of 1750.
If he can keep 12 mph on the road, he'll be doing well. The forecast says Gusts up to 30 mph for Wexford before midday. That's over twice his riding speed.
I had said once "The first ten miles are the worst", but I will correct this to be "The first seventy miles are the worst".