New idea for a feature

Is there a way you could do a play back for the stored activity? So if im biking running ect. I could see the play back in real time? Example I’m running i want to see where I picked up speed and where I feel off.

I can’t remember the name, something starting with R… that users once asked - app that does such animation with Google satellite maps.

So far there are colored lines that shows speed range.