Tienes que seguir calentando para mantener tu fuerza.

Questions & Answers about Tienes que seguir calentando para mantener tu fuerza.

Why is it seguir calentando instead of just seguir calentar for 'to keep warming up'?
To express that an action is ongoing (like 'to keep doing something'), Spanish uses seguir or continuar followed by the gerund form of the verb, which ends in -ando or -iendo. Here, calentando is the gerund of calentar (to warm up). Using the infinitive (seguir calentar) would be grammatically incorrect in this structure.
Could I use continuar instead of seguir in this sentence?
Yes! You can say Tienes que continuar calentando and it means exactly the same thing. In everyday spoken Latin American Spanish, seguir is generally more common for 'to keep doing something', but both are perfectly correct.
Why is seguir in the infinitive instead of being conjugated?
Because it follows the phrase Tienes que (You have to). The formula for obligation is tener que + infinitive. Even though we have a long chain of verbs here, only the first one (Tienes) is conjugated to match the subject 'you'. The second verb (seguir) must stay in the infinitive, and the third (calentando) takes the gerund form.
Why do we use para instead of por before mantener?
We use para here because it expresses a purpose or a goal. Whenever you want to say 'in order to' do something in Spanish, you use para followed by an infinitive verb. Here, the goal of warming up is 'in order to maintain' (para mantener) your strength.

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