Why Does Apple Not Have an Activity Website?
Pardon the busy design, but why doesn't a website like this exist? Is it Apple's obsession with privacy and not wanting your health data ever touching the cloud? Does it have something to do with a bigger plan in the future? Maybe it's just a lack of interest entirely.
Whatever the reason, I think it is unforgivable that your activity data from your Apple Watch is not accessible via the web, nor is it saved anywhere besides locally to your iPhone. When you look at every other workout service out there, they have a web presence that allows people to see and manipulate their workout data from wherever they are. Apple is the one exception to this rule and its maddening.
And Apple, if you do decide to make a page for this information in the future, don't steal my design, it was cobbled together from a bunch of iPhone screenshots. I'm sure you can do better.