I started using a treadmill desk in 2007 and switched to simply standing around 2011. I like it largely because it helps counteract lulls in energy, e.g. after

I started using a treadmill desk in 2007 and switched to simply standing around 2011. I like it largely because it helps counteract lulls in energy, e.g. after lunch. Your ability to concentrate while standing will improve over time, but for certain tasks like intense coding, I often prefer to sit, even after this many years. I have an Ikea Bekant desk with motorized adjustment and probably alternate 2-3 times a day.