Tập đều đặn là thói quen tốt cho sức khỏe.

Yes, in this sentence tập most naturally means to exercise / to work out.

On its own, tập can have several related meanings depending on context, such as:

• to practice
• to train
• to exercise

Because the sentence ends with tốt cho sức khỏe (good for health), the meaning here is clearly exercise, not just general practice.

So Tập đều đặn here means exercising regularly.

Vietnamese often leaves out words that are understood from context.

• tập thể dục = to do physical exercise
• tập by itself can still mean exercise if the situation makes that clear

Since the sentence talks about health, native speakers can easily understand that tập means physical exercise.

So both of these work:

• Tập đều đặn là thói quen tốt cho sức khỏe.
• Tập thể dục đều đặn là thói quen tốt cho sức khỏe.

The second one is more explicit. The first one is shorter and still natural.

Đều đặn means regularly, consistently, or at steady intervals.

It suggests doing something in a stable, ongoing way, not just occasionally.

So:

• tập đều đặn = exercise regularly
• not just exercise once in a while

This is a very common collocation in Vietnamese.

In Vietnamese, adverbs like đều đặn often come after the verb.

So:

• tập đều đặn = literally exercise regularly

This is normal Vietnamese word order.

English often puts the adverb in different places, but Vietnamese commonly uses:

• verb + adverb

Examples:

• học chăm chỉ = study hard
• làm việc nghiêm túc = work seriously
• tập đều đặn = exercise regularly

Là is the linking word, similar to is / am / are in English in some situations.

Here it connects:

• Tập đều đặn = the subject idea (exercising regularly)
• thói quen tốt cho sức khỏe = the description (a good habit for health)

So the structure is:

• Tập đều đặn
  • là
    • thói quen tốt cho sức khỏe
• Exercising regularly
  • is
    • a good habit for health

A useful way to think of it is:

• là often links one noun phrase or idea to another.

It is basically a verb phrase, but in this sentence it functions like a noun idea: exercising regularly.

Vietnamese can use verbs or verb phrases as the subject of a sentence without changing their form.

So:

• Tập đều đặn literally contains the verb tập
• but as a whole it means the act of exercising regularly

English does something similar with -ing forms:

• Exercising regularly is good for your health.

Vietnamese does not need a special ending like -ing here.

Thói quen means habit.

tốt means good.

So:

• thói quen tốt = a good habit

Word order in Vietnamese is:

• noun first: thói quen
• adjective after it: tốt

This is very common in Vietnamese:

• sách hay = good/interesting book
• người tốt = good person
• thói quen tốt = good habit

Because Vietnamese adjectives usually come after the noun they describe.

So:

• thói quen tốt = literally habit good
• natural English translation: good habit

This is one of the big word-order differences between English and Vietnamese.

Compare:

• English: good habit
• Vietnamese: thói quen tốt

cho sức khỏe means for health or more naturally for your health / for one’s health.

In this sentence, tốt cho sức khỏe means:

• good for health
• beneficial to health

So the whole phrase:

• thói quen tốt cho sức khỏe means
• a habit that is good for health

This is a very common pattern:

• tốt cho + noun

Examples:

• tốt cho da = good for the skin
• tốt cho tim = good for the heart
• tốt cho sức khỏe = good for health

Because cho in this pattern expresses benefit toward something.

In tốt cho sức khỏe:

• tốt = good
• cho = for
• sức khỏe = health

Together, it means good for health.

You should learn tốt cho as a set phrase:

• có lợi cho = beneficial for
• tốt cho = good for
• xấu cho = bad for

So cho is the normal word here.

Sức khỏe is a noun, meaning health.

It does not mean healthy.

So:

• sức khỏe = health
• khỏe = healthy / well / in good condition

Examples:

• Sức khỏe của tôi tốt. = My health is good.
• Tôi khỏe. = I am healthy / I’m well.

In your sentence, sức khỏe is the correct noun because the phrase is good for health.

It says health in general, but in natural English we often translate it as your health.

Vietnamese often leaves possession unstated when it is obvious or general.

So:

• tốt cho sức khỏe literally = good for health
• natural English = good for your health or good for one’s health

Both ideas fit the sentence.

Technically tập can mean practice, so that translation is possible in some contexts. But in this sentence, for health strongly points to exercise.

So the most natural translation is:

• Exercising regularly is a good habit for your health.

If the sentence were about music, language learning, or a skill, then tập might mean practice instead.

Context decides.

Yes, you can.

Adding việc makes the action sound more explicitly like the act of doing something.

So:

• Tập đều đặn là thói quen tốt cho sức khỏe.
• Việc tập đều đặn là thói quen tốt cho sức khỏe.

Both are grammatical.

The version without việc sounds simpler and more natural in a general statement.
The version with việc can sound slightly more formal or abstract.

Yes, it is natural and easy to understand.

A few very natural alternatives are also common, such as:

• Tập thể dục đều đặn tốt cho sức khỏe.
  = Exercising regularly is good for your health.

• Tập thể dục đều đặn là một thói quen tốt cho sức khỏe.
  = Exercising regularly is a good habit for your health.

Your original sentence is perfectly fine. It sounds like a general health statement.

No, you do not have to use một here.

Vietnamese often omits words like a/an when they are not necessary.

So both are possible:

• là thói quen tốt cho sức khỏe
• là một thói quen tốt cho sức khỏe

Difference:

• without một: more general, slightly more concise
• with một: explicitly a good habit

Both are correct.

A rough pronunciation guide is:

• Tập → close to tup with a short, clipped ending
• đều đặn → roughly zayw duhng or yeu duhng, depending on accent
• là → lah
• thói quen → roughly toy qwen
• tốt → toht
• cho → chaw
• sức khỏe → roughly sook khweh

A few important points:

• Vietnamese is tonal, so the tones matter a lot.
• Final consonants like -p, -t, and -c/k are often unreleased and short.
• Regional accents differ, especially between northern and southern Vietnamese.

If you want to sound natural, it is better to learn the sentence by listening to native audio rather than relying only on English-style spelling.