Хорошо бы делать короткое упражнение на дыхание каждый вечер.

every

Breakdown of Хорошо бы делать короткое упражнение на дыхание каждый вечер.

• вечер: the evening
• на: for
• упражнение: the exercise

Questions & Answers about Хорошо бы делать короткое упражнение на дыхание каждый вечер.

What does бы do in Хорошо бы делать…? Could we just say Хорошо делать…?

Бы is a particle that adds a hypothetical / “would” meaning.

• Хорошо делать короткое упражнение…
  = It’s good to do a short exercise… (a general statement of fact or recommendation)

• Хорошо бы делать короткое упражнение…
  = It would be good to do a short exercise… (a wish, an ideal, a soft suggestion)

So бы makes it sound like: “It would be good if (someone / we / you) did this.”
Without бы, it sounds more like a straightforward statement: “Doing this is good.”

Both versions are grammatically correct; the one with бы is just more like advice or a gentle “it would be nice if…”.

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Where is the subject in this sentence? Who is supposed to do the exercise?