I don't get why people go from one extreme (sitting all day) to another (standing all day). Why not alternate between standing and sitting ? This is what I pl

I don't get why people go from one extreme (sitting all day) to another (standing all day). Why not alternate between standing and sitting ? This is what I plan on doing when I will have the budget for a standing desk : I will keep my sitting desk and alternate between the 2. Unfortunately I can't have a standing desk at work : people don't like "different" here (even if they think of themselves as open minded).