This is a known result of using what is called "NHST", null hypothesis significance testing, to come to conclusions. It will automatically generate conflicting results and does nothing to lead to cumulative knowledge. Some discussion of that aspect can be found here:
https://www.runnersworld.com/sweat-science/standing-all-day-...
And so is lying down in bed :)
https://www.scienceabc.com/humans/why-is-it-a-bad-idea-to-st...
Oh, and what about running
https://www.active.com/health/articles/why-too-much-running-...
https://www.runnersworld.com/runners-knee
It seems the best is normal movement and walking, and taking breaks.
Too much of anything is bad. But perhaps generalizations like this lead to a lot of sensationalism.
Here's another one. Are you better off staying in or heading out for a while every day?
Staying in:
https://www.healthline.com/nutrition/vitamin-d-deficiency-sy...
https://www.vitamindwiki.com/Suicide+associated+with+low+vit...
Going out:
http://www.cancerresearchuk.org/about-cancer/causes-of-cance...
http://www.youbeauty.com/beauty/sun-and-acne/
It is like those studies in the past which said wine is good for the heart ... wait it's not good ... wait a small amount is good and too much is bad.
http://www.mayoclinic.org/diseases-conditions/heart-disease/...