You sound so attached to that FAANG office of yours. Use that FAANG salary to get a nice chair, a sturdy table, good coffee and a coffee machine. Home or office, staring at a screen all day ain't good for no one. And that weight is from the eating not the sitting. Try cutting that out a bit and run around your home, setup a home gym, do some pushups. And for fucks sake turn that phone off, shut that laptop and get some good sleep. I'm on my way to get some. Good night and good luck.