Working in an office, I never considered it a secret that I was not productive 100% of the time. I didn't have to lie to my boss about checking some amount of s

Working in an office, I never considered it a secret that I was not productive 100% of the time. I didn't have to lie to my boss about checking some amount of social media, or taking a long coffee break, or checking HackerNews when my brain needed a break (which I consider part of my job to some extent), or chatting with co-workers about how our weekends were. None of this was a secret, open or not, it was all entirely revealed. Maybe I had unusually tolerant bosses or different than yours. But those very same bosses, who certainly did not expect productivity 100%, if they knew I was only working 4-hour days routinely and spending the other 4 hours on personal matters, would think, hm, it sounds like you don't have enough work to do. It doesn't seem the same to me, cause if I'm only working 4-hour days, and riding my bike the remainer of the 4 hours -- I'm probably not 100% productive those 4 hours I'm working either! I mean, I don't begrudge anyone what they do to survive. But it makes me deeply uncomfortable to mislead my bosses like that (like, I have to make sure to keep my personal life entirely secret to make sure I don't slip up and let them know I didn't work at all on Tuesday but went on a hike instead), and I also would feel weird about pushing back when they give me too much work. If they give me so much work that I can't do it in my ordinary work week, I push back -- we can only get so much done in a week. But I'm going to push back because they're assigning so much work that it eats into my daily 4-hour bike ride?