Learn Spanish (Latin America): Corrí un kilómetro hace una hora y sigo entrenando. - I ran a kilometer an hour ago and I'm still training.

While todavía estoy entrenando also means "I am still training," using the verb seguir followed by a gerund (like entrenando) is the most natural way in Spanish to express that you are continuing an action you already started. It translates more literally to "I continue training" or "I keep on training."

Can I use continúo entrenando in this sentence instead?

Yes! When expressing a continuous action, seguir and continuar mean the exact same thing. You can absolutely say continúo entrenando, but sigo entrenando is generally much more common in casual, everyday conversation.

How does hace una hora translate to "an hour ago"? Doesn't hace mean "it makes"?

Exactly! Literally, it translates to "it makes an hour." However, in Spanish, the formula hace + [amount of time] is the standard way to say that something happened a certain amount of time "ago."

Why is it corrí (preterite) rather than corría (imperfect)?