This is the 16690th most frequent Russian word.
сказались
"Сказались" means "manifested," "affected," or "took a toll."
Here, 'сказались' is used to describe an impact or effect that difficulties have on someone's health.
Эти трудности сказались на его здоровье.
These difficulties affected his health.
In this sentence, 'сказались' refers to the influence or consequences of shortcomings on the outcome.
Все недоработки сказались на итоговом результате.
All shortcomings influenced the final result.
'Сказались' here indicates the effects of stress and fatigue on behavior.