I actually misread your original post, and just took your 300g number at face value. 300g actually isnt actually right. In your example 70kg athlete, 6-10g of carbs/kg is 420-700g per day. The carb loading numbers I’ve read before are often in the 600+ gram range.
300g at the 4 cals per g ratio isn’t entirely outrageous, if you’re doing up to 3hrs per day. That’s 21hrs per week, which I doubt anyone here is managing. It’s probably reasonable if you are at optimal weight already. Most of us however (based on the weigh-in thread!) are trying to run a reasonable deficit whilst still providing enough fuel for training.
I don’t track my nutrition, but looking at a fairly basic sandwich I’d pick up from the nearby shop for lunch, that’s 40g, before I even think about what goes with it, etc. I imagine it would stack up quite quickly to reach a reasonably high level.
Yeah, 300g immediately before race start would be tough (/rough!), but I get close to the lower end limit.
My morning IM/HIM traditional breakfast is:
- large bowl of porridge, with chocolate spread melted in, plus a chopped banana (that’s about 30g in the porridge, 10g in the chocolate spread, and maybe about 20g in an average banana)
- cinnamon and raisin bagel, with biscuit spread and peanut butter (bagel has 43g of carbs, and about another 20g from the spreads)
- another banana (20g)
- a gel 5mins before race start (23g)
That’s spread over a 2.5hr window pre-race, so in that time I’ll end up ingesting c170g of carbs.