Author shameless review here. This novel is still in progress and will be rewritten once it's finished.

From the looks of it, its due to the statuses being images. Since I originally write the story on RoyalRoad and webnovel doesn't have image support for chapters. Here is the status screen:

We are talking about people who went from using standard human strength, to increasing the output of their physical bodies to that of heavy weight boxers in a mere few months, while those boxers trained for years to achieve such results. Plus 800 jin is just the average of for five body refinements. As you will see from future chapters, it goes further than that and everyone is different. The force in the body refining stage is just measuring the force of the body without any runic energy.