Redoviti trening pomaže mom zdravlju.

The subject is redoviti trening.

It is in the nominative singular because it is the thing doing the action of pomaže.

• trening = a masculine singular noun
• redoviti = an adjective that agrees with trening in gender, number, and case

So the whole subject phrase is nominative masculine singular.

Because it has to match trening.

In this sentence, redoviti is the masculine singular nominative form used with the noun trening.

You may also come across redovit trening in Croatian. The -i form is very common before a noun, so redoviti trening sounds completely normal.

The main thing for a learner is: adjectives change form to agree with the noun they describe.

Pomaže is the 3rd person singular present tense form of pomagati.

It is singular because the subject, redoviti trening, is singular.

So:

• ja pomažem = I help
• ti pomažeš = you help
• on/ona/ono pomaže = he/she/it helps

Here, trening is grammatically singular, so the verb must also be singular: pomaže.

The dictionary form is pomagati.

That is the imperfective verb, which is often used for general truths, habits, or ongoing actions.

Croatian also has the related perfective verb pomoći.

So:

• pomagati = to help, to be helping, to help regularly
• pomoći = to help once, to give help as a completed action

In this sentence, the idea is general and habitual, so pomaže from pomagati is the natural choice.

Because the verb pomagati takes the dative case.

The basic form is zdravlje.
But after pomaže, it changes to the dative: zdravlju.

A very useful pattern is:

• zdravlje = nominative
• zdravlju = dative/locative

So Croatian is not saying this in the same way English does grammatically. After pomagati, the thing being helped goes into the dative.

Because the possessive word has to change case too.

The basic phrase is:

• moje zdravlje = my health

But after pomaže, the noun goes into the dative, and the possessive must agree with it:

• mom zdravlju = to my health

So both words change:

• moje → mom
• zdravlje → zdravlju

This is very common in Croatian: the whole noun phrase changes to match the case required by the verb.

Mom is a standard and very common form here.

You may also hear or see a longer form such as mome in some styles, but mom zdravlju is perfectly correct and natural.

For a learner, the safest takeaway is:

• moje zdravlje = nominative
• mom zdravlju = dative

Yes. That is the normal pattern.

Examples:

• Pomažem prijatelju. = I help my friend.
• Ona pomaže djeci. = She helps children.
• To pomaže zdravlju. = That helps health.

So you should not say pomaže moje zdravlje in this structure. With pomagati, Croatian wants the dative, not the accusative.

Because this sentence expresses a general fact.

Pomaže comes from the imperfective verb pomagati, which is the normal choice for:

• habits
• repeated actions
• general statements
• ongoing situations

Pomogne comes from the perfective verb pomoći and usually suggests a more single, completed helping event.

So:

• Redoviti trening pomaže mom zdravlju. = a general truth
• To mi pomogne. = that helps me out in a particular instance

Yes. Croatian word order is more flexible than English word order.

The original sentence is neutral and natural:

• Redoviti trening pomaže mom zdravlju.

But you could also say:

• Mom zdravlju pomaže redoviti trening.

That version puts more attention on mom zdravlju.

So the original order is a good default, but other orders are possible for emphasis.

Because Croatian does not have articles.

So Croatian does not normally mark the difference between:

• a regular workout
• the regular workout
• regular training

That kind of meaning usually comes from context instead.

In this sentence, it sounds like a general statement, so English naturally translates it in a general way.

Trening is masculine.

You can tell this from the way the adjective agrees with it:

• redoviti trening

If you used the past tense, the masculine gender would be even clearer:

• Trening je pomogao mom zdravlju.

So when learning the noun, it is useful to remember:

• trening = masculine noun

The tricky part is lj.

In Croatian, lj is a single sound, not a separate l plus j. It is similar to the lli sound many English speakers use in million, though not exactly the same for everyone.

A rough pronunciation guide:

• pomaže ≈ po-MA-zhe
• zdravlju ≈ ZDRA-vlyu

Also useful:

• ž sounds like the s in measure
• j sounds like English y in yes
• Croatian letters are pronounced quite consistently, so spelling is a very good guide to pronunciation.