An important lesson for you to keep in mind is that even if you can burn it off, it's still bad for you.
I worked construction in the heat and did nothing but eat 1-2 Tbsp chunks of straight butter, and/or nut butter and drank 2-4 liters of mostly water and a diy Gatorade made from ACV, salt, lime juice and water. I had more energy than I knew what to do with and cognitive performance was night and day better.
Consider LCHF. If you're doing it right it does take a week or two to get your body and metabolism to basically switch over but it's a better option for someone like you looking for energy and endurance.
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