This is the coolest feature Spotify added today by Ben Geier @FortuneMagazine May 20, 2015, 1:20 PM EDT E-mail Tweet Facebook Google Plus Linkedin Share icons Runners of the world, Spotify has got the update for you. The popular music streaming app is adding a special mode for running that plays music that syncs up to the pace of your run, along with a slew of other new features. The feature works like this: you start the running mode, and then you start running. Using the technology already in your phone, Spotify figures out how fast you’re going and picks music where the beats-per-minute matches up. You can choose to either have music selected based on what you’ve listened to before, use a multi-genre playlist or hear new tracks made by DJs specifically for running. So if you’re just going for a pleasant jog, we’d imagine you might get something mid-tempo, like Mumford and Sons. Run a little faster and maybe some Jay-Z will hit you. If you’re really going all out, it would make sense that Spotify would play some gnarly fast, double-bass driven thrash metal, like Slayer.