Когда забываешь про выдох, даже спокойный вдох не помогает держать ритм.

In Russian, the 2nd person singular is often used for general statements about what typically happens to a person. It works a lot like informal English you in sentences such as:

• When you forget to breathe out, even a calm inhale doesn’t help keep the rhythm.

So забываешь here does not necessarily refer to one specific person. It means something like whenever you forget / if you forget / when one forgets.

This is very common in Russian for advice, observations, and general truths.

Both когда and если can sometimes be translated as when/if, but they are used a little differently.

• когда забываешь = when you forget, describing something that happens at the moment or whenever it happens
• если забываешь = if you forget, focusing more on a condition

In this sentence, когда presents the situation as a typical occurrence:
When you forget about the exhale, even a calm inhale doesn’t help keep the rhythm.

So когда makes the sentence sound like an observation about what happens in that situation.

Yes, both are possible, but they are a bit different in tone.

• забыть про что-то = very common in everyday speech; more conversational
• забыть о чём-то = also correct, often a little more neutral or literary

So:

• забываешь про выдох = natural, colloquial
• забываешь о выдохе = also correct, slightly more formal or bookish

For many learners, it is useful to remember that забыть про + accusative is extremely common in spoken Russian.

Because the preposition про normally takes the accusative case.

So:

• про выдох = about the exhale

The noun выдох is a masculine inanimate noun, and for many such nouns the accusative singular looks exactly like the nominative singular. That is why you see:

• nominative: выдох
• accusative: выдох

If it were a different noun, the ending might show the case more clearly.

These are nouns related to breathing:

• вдох = inhale, inhalation
• выдох = exhale, exhalation

They come from the verbs:

• вдыхать / вдохнуть = to inhale
• выдыхать / выдохнуть = to exhale

In this sentence, the speaker is talking about breathing rhythm, so the contrast between вдох and выдох is important.

Because спокойный is an adjective describing the noun вдох.

• вдох = inhale
• спокойный вдох = a calm inhale

If you used спокойно, that would be an adverb, meaning calmly. That would describe an action, not the noun itself.

Compare:

• спокойный вдох = a calm inhale
• вдыхать спокойно = to inhale calmly

So here the sentence needs the adjective form because it is modifying the noun вдох.

Because вдох is the subject of the main clause:

• даже спокойный вдох не помогает держать ритм

Literally:

• even a calm inhale does not help keep the rhythm

Here, вдох is the thing that does not help, so it is in the nominative.

The verb помогать / помочь can be followed by an infinitive to mean help to do something.

So:

• помогает держать = helps to keep
• помогает понять = helps to understand
• помогает уснуть = helps to fall asleep

In this sentence:

• не помогает держать ритм = does not help maintain the rhythm

This is a very common structure in Russian.

Yes, сохранять ритм is possible, but держать ритм is a very natural, idiomatic way to say keep the rhythm.

Compare:

• держать ритм = keep the rhythm, stay in rhythm
• сохранять ритм = preserve/maintain the rhythm, a bit more formal or technical in some contexts

In a sentence about breathing, movement, music, exercise, or pacing, держать ритм sounds very natural.

Даже means even. It adds emphasis.

So:

• даже спокойный вдох не помогает держать ритм
• even a calm inhale does not help keep the rhythm

The idea is that not only are other things unhelpful, but even something that seems helpful or controlled — a calm inhale — is not enough.

Its placement before спокойный вдох shows that the emphasis falls on that whole phrase.

Because Russian usually omits subject pronouns when they are clear from the verb ending.

• забываешь already means you forget
• the ending -ешь shows 2nd person singular

So adding ты is usually unnecessary unless you want emphasis or contrast.

Compare:

• Когда забываешь про выдох... = normal
• Когда ты забываешь про выдох... = more emphatic, perhaps contrasting with someone else

Russian does this much more often than English.

Yes. The comma separates the subordinate clause from the main clause.

Structure:

• Когда забываешь про выдох, = subordinate clause
• даже спокойный вдох не помогает держать ритм. = main clause

So the comma is required because когда introduces a dependent clause.

They are imperfective because the sentence describes a general process or repeated situation, not one completed event.

• забываешь = you forget / when you forget, as a recurring possibility
• помогает = helps, in a general sense
• держать = to keep, maintain, sustain

If the sentence were about one specific completed event, aspect choices might be different.

For example:

• Когда ты забыл про выдох, вдох не помог удержать ритм.

That would sound more like a specific past event.

In the original sentence, the imperfective aspect fits the meaning of a general observation.

Yes. Russian word order is flexible, but changing it changes the emphasis.

Original:

• Когда забываешь про выдох, даже спокойный вдох не помогает держать ритм.

This is natural and clear.

Possible variation:

• Когда забываешь про выдох, спокойный вдох даже не помогает держать ритм.

This is possible, but the emphasis shifts slightly.

Another variation:

• Даже спокойный вдох не помогает держать ритм, когда забываешь про выдох.

Also possible, but it sounds a bit more shaped for emphasis or style.

So the original word order is a good neutral version.

Not quite.

• забываешь про выдох = you forget about the exhale; your attention drops it, you neglect it
• забываешь выдохнуть = you forget to exhale; more directly about failing to perform the action

The original sentence focuses on the idea that the speaker or person neglects the exhale as part of the breathing pattern, not just one mechanical action. That is why про выдох works well here.