On the website, when I look at the data from a run, I primarily look at the graph of the data.
I find myself scrolling down to what I want to look at, clicking on it, and then scrolling back up to see it on the graph. Scroll down again and unselect that metric, then select something else, and scroll back up to see the graph.
I’m wondering if the page would be improved by making everything under the graph so it is contained in its own scrollable sub-window. That way you could move around and select and deselect what to see without ever having the graph view leave your viewing window.