Two recommendations

[derg]

I haven't tried it myself, but there's an android app called "Zombies, Run!" that uses your gps to simulate a zombie apocalypse, where you have run away to save yourself. It's rated pretty highly, so for those of you who are bored when running, it might be something to try out.

I have it but haven't used it yet.

 

[Screaming_Emu]

You'll thank me when you're 30.

You mean this coming August? :-/

 

[derg]

You mean this coming August? :-/

Ooh!

You little bastards grow up so fast!

Seriously, stay ahead of the metabolism shift!