Im attempting to eat 4000 calories a day but failing. No appetite in the heat ive lost around 10 kilos
That’s the same issue i’ve had on multiday tours and events. Usually trying to put away a fair chunk more than that though, after about a week it was pretty much forcing something like 4 bottles of energy drink down your neck (500 calories per bottle) and a HUGE plate of pasta, with creamy, cheesey sauce, maybe 2500 calories, then flapjacks and baguettes etc during the day, plus my normal drink intake.
Still hungry all the time, or massively over full immediately after eating and borderline dehydrated at the end of every day.
Also got to watch nutrient and protein intake etc or that’ll end up screwing you up long term.
Unfortunately, i usually started events/tours with pretty much zero weight to spare!