This is the 273rd most frequent Serbian word.
умерен
Moderate.
Умерено here is used to describe the weather as moderate or not extreme.
Време је данас умерено, са благим ветром.
The weather is moderate today, with a gentle breeze.
Умерено in this sentence refers to the manner of eating, implying moderation or balance.
Он једе умерено како би одржао здрав живот.
He eats in moderation to maintain a healthy life.
Умерен modifies тренинг (exercise) and describes its intensity as medium or not too intense.