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Either way you’re still going to be engaging the fat metabolism.
You might find the pre-run drink makes the 30-40minute slot (where you switch fuels regardless of faster or not) a more noticeable’bonk’ but you might not.
Try it- see- it won’t change anything, and you especially really don’t need to be worried about fat burn! -
I prefer fasted for that type of run as long as I’ve refuelled properly from the previous.
It’s taken me years to realise that I suffer from reactive hypoglycaemia and if I eat too close to running (unless within 5 mins) I feel much worse.
If I’m doing 60-75 minute pre-breakfast run every other day (upper zone 1 or 75% max HR) should I go fasted, or energy drink before?
Feels fine fasted - am I getting any kind of fat metabolism benefit that would be negated by skulking a load of sugar? Probably 33 to 40g of carbs in a drink.
I’d be having an electrolyte drink before anyway as it’s 30+ degrees here 🙃