I’ve noticed that the treadmill desk still takes quite a bit out of me when I use it for many hours a day, although I’ve managed to avoid the pains and soreness associated with bad ergonomics and an inclined/declined treadmill. I went on a hike and was surprised as to how tired I was. (Much more than usual). Perhaps it would be prudent to take a break from the treadmill before going on a hike or backpacking trip during this time frame.
Sore feet are a real pain. I bought shoes that I keep specifically for the treadmill, but I’ve also had to adjust the heights because of the extra padding.
Still painful, but I’m starting to figure out how to tweak the treadmill incline and desk position to make it more ergonomic. I’ve been noticing that walking is much less natural at a treadmill desk and a lot of effort is used to stay steady enough for typing and for not falling over.