This is the 3463rd most frequent Polish word.
zdrowotne
"Zdrowotne" means "health-related" or "pertaining to health."
Here, 'zdrowotne' is used as an adjective to describe 'effects' (efekty) in relation to health.
Regularne ćwiczenia mają pozytywne efekty zdrowotne.
Regular exercise has positive health effects.
In this sentence, 'zdrowotnych' is used as a declined form of the adjective 'zdrowotne' to fit the genitive plural form of 'problems' (problemów).
Unikaj stresu, aby uniknąć problemów zdrowotnych.
Avoid stress to prevent health issues.
Here, 'zdrowotna' is used in its singular feminine form to agree with the noun 'conference' (konferencja).