Learn Turkish: Çeviklik ve kondisyon önemli olduğu için her gün spor yapıyor. - Because agility and conditioning are important, she works out every day.

To express 'because [a full statement] is true', Turkish uses the factive participle -dIk attached to the verb, which here is olmak (to be). Önemli olduğu için translates roughly to 'due to its being important'. If you only used için, it would need a simple noun or pronoun before it. Olmak için would change the meaning entirely to 'in order to be important'.

The subject of the first part is çeviklik ve kondisyon (two things). Why does olduğu take the singular possessive suffix -u instead of the plural -ları?

In Turkish grammar, when a plural subject is non-human (such as concepts, animals, or objects), the verb or participle generally takes the 3rd person singular form. Therefore, olduğu için is perfectly grammatical here and sounds much more natural than oldukları için.

How is the word çeviklik formed?

It comes from the adjective çevik, which means agile or nimble. The suffix -lIk turns the adjective into an abstract noun meaning agility, exactly like adding '-ness' or '-ity' in English.

Why is the English phrase 'works out' translated as spor yapıyor?