Hi ! Let's just quickly correct a small mistake: the right way to conjugate "correr" in the first person singular is "Yo corro." not "Yo corra". But having put that small mistake aside, here's the explanation: If you say "Yo corro" it's the same thing as saying "I run" in English. It's the present tense, and it can mean that you're doing the activity while you say it, but usually it means that you do it with a certain regularity. If you say "Yo estoy corriendo" it's the same as saying "I'm running" or "I am running". It usually means you're in the middle of doing something (like running) but it applies to any verb. For example "Estoy cocinando" means "I'm cooking". If you simply said "Yo cocino" it means "I cook" which usually means that you can cook, that you do it with a certain regularity. Hope this helps. Buena suerte!

Thank you for all of your helpful comments!

Si quiere salvar su vida,corra. Ahora mismo estoy corriendo. Se me hace tarde asi que voy corriendo.

For example "corriendo"it's like now in that time u running so u can use ,corriendo no mira por el tiempo ...(am running (in that time right now) and no watching to time ...like u do some so fastly and forgot look at time ,corra is like u can say "hey run! " corre! Corra

Could I say, for example, “estoy tarde así que estoy corriendo”?