Questions & Answers about Pływanie jest bardzo zdrowe.
How do we form the verbal noun pływanie from the verb pływać?
To form a verbal noun from a verb ending in -ać, we simply drop the final -ć and add the suffix -nie. This turns the verb pływać (to swim) into the noun pływanie (swimming).
Why does the adjective zdrowe end in -e rather than -y or -a?
All verbal nouns created with the suffixes -nie or -cie are grammatically neuter. Because pływanie is a neuter noun, any adjective describing it must take the neuter nominative ending, which gives us zdrowe (healthy) instead of the masculine zdrowy or feminine zdrowa.
Could I use the infinitive and say pływać jest bardzo zdrowe?
Using the verbal noun pływanie is the most natural way to express this, acting exactly like the '-ing' gerund in English. While you might occasionally hear Polish speakers use an infinitive as a subject in casual speech, verbal nouns are strongly preferred when stating general facts about an activity.