wèile shēntǐ jiànkāng, wǒmen yīnggāi duō zuò yùndòng.

为 / 为了 here introduces a purpose.

• Structure: 为了 + purpose，+ (subject) + action
• Meaning pattern: "In order to / For the sake of + purpose, (we) do X."

So:

• 为了身体健康，我们应该多做运动。
  = In order to have good health, we should do more exercise.

This is different from a cause like 因为 (“because”). 为了 focuses on goal / intention, not on reason / cause.

In everyday modern Chinese, the natural form here is 为了身体健康.

• 为了 is the common fixed form for “in order to / for the sake of”.
• 为 by itself can also mean “for”, but:
  • It sounds more formal / literary in this position.
  • In textbooks and spoken Mandarin, 为了 is much more common for expressing purpose before a clause.

So you will most often hear and see:

• ✅ 为了身体健康，我们应该多做运动。 (very natural)
  You can see 为身体健康 in more formal writing, but 为了 is safer and more typical for learners.

Both are grammatically possible, but they feel different:

• 身体健康 (no 的)

  • Literally: “body healthy”
  • Functions like a set phrase / fixed expression meaning “bodily health” or “good health”.
  • Very natural and common: 祝你身体健康！ (“Wish you good health!”)

• 身体的健康 (with 的)

  • Literally: “the health of the body”
  • Sounds more formal, analytical or emphasizes the concept “health” as a noun.

In this sentence, 身体健康 is smoother and more idiomatic:

• ✅ 为了身体健康，我们应该多做运动。
• ❌ 为了身体的健康，我们应该多做运动。 (not wrong, just more heavy/formal)

It’s functioning a bit like both in English, but grammatically in Chinese it’s an adjective.

• 身体健康 = “(the) body is healthy”
  
  • In many contexts this whole phrase is understood as “(one’s) health”.

Compare:

• 他很健康。 – “He is very healthy.” (adjective)
• 他的健康很重要。 – “His health is very important.” (noun use of the idea)

In fixed phrases like 身体健康, Chinese doesn’t need to turn it explicitly into a noun; the phrase just means “health / being healthy” in context.

多 here is an adverb meaning “more / do … more”.

• 做运动 = “do exercise” (neutral amount)
• 多做运动 = “do more exercise / exercise more (often / more than now)”

So 多 tells you to increase the frequency or amount of the action.
This pattern is very common:

• 多喝水。 – Drink more water.
• 少吃糖。 – Eat less sugar.
• 多休息。 – Rest more.

Without 多, the sentence would just say “We should do exercise” (no idea of “more than now”):

• 我们应该做运动。 – “We should do exercise.”
• 我们应该多做运动。 – “We should do more exercise.”

Both can be translated “do a lot of exercise”, but the nuance differs:

• 多做运动

  • General suggestion / habit: “You should exercise more (regularly / in general).”
  • Focus: increase compared to what you do now.

• 做很多运动

  • Emphasizes the large amount of exercise.
  • Often describes a fact: “He does a lot of exercise.”

So:

• Advice:
  
  • ✅ 你应该多做运动。 – You should exercise more.
• Description:
  
  • ✅ 他每天做很多运动。 – He does a lot of exercise every day.

Both are acceptable, but usage preferences vary:

• 运动 alone can be a verb:

  • ✅ 我们应该多运动。 – We should exercise more. (very natural)

• 做运动 (literally “do exercise”)

  • Also understood and used, especially under influence of English/Cantonese.
  • In Mainland Mandarin, many speakers feel 多运动 or 多锻炼 is a bit more natural.

So good alternatives are:

• 为了身体健康，我们应该多运动。
• 为了身体健康，我们应该多锻炼。

As a learner, 多运动 and 多锻炼 are very safe, idiomatic choices.

They overlap, but there’s a nuance:

• 运动 (yùndòng)

  • Means sports / physical exercise.
  • As a noun:
    
    • 我喜欢运动。 – I like sports / exercising.
  • As a verb:
    
    • 我们每天运动。 – We exercise every day.

• 锻炼 (duànliàn)

  • Means to train / to work out / to exercise (the body or ability).
  • Often used with 身体:
    
    • 锻炼身体。 – to exercise / to work out (literally “train the body”).

In your sentence, you could say:

• 我们应该多运动。
• 我们应该多锻炼。
• 我们应该多锻炼身体。

All of these are natural ways to say “We should do more exercise.”

应该 (yīnggāi) is a modal verb meaning “should / ought to”.

• It expresses suggestion, reasonable duty, or expectation, not a strict command.

Strength comparison:

• 应该 – should, ought to (mild to medium)
• 要 / 得 – must, have to (stronger necessity/requirement)

Examples:

• 你应该多做运动。 – You should exercise more. (advice)
• 你得去医院。 – You must go to the hospital. (strong necessity)

Position: 应该 comes before the verb phrase:

• ✅ 我们应该多做运动。
• ❌ 我们多应该做运动。 (incorrect word order)

Yes, in the right context.

• 我们应该多做运动。 – Explicitly “We should exercise more.”
• 应该多做运动。 – “(People) should exercise more.”
  
  • Subject is understood from context; it could be “we”, “you (general)”, or “everyone”.

Chinese often drops the subject when it’s clear:

• 累了就休息。 – “(When you / we / one is) tired, (you / we / one should) rest.”

Putting 为了身体健康 at the start makes it a purpose clause, setting up the reason / goal before the main statement:

• 为了身体健康， 我们应该多做运动。
  – “In order to be healthy, we should exercise more.”

You can also move it after the subject:

• 我们为了身体健康，应该多做运动。 – also correct.

Both are grammatical; starting with 为了… sounds quite natural and is very common in written and spoken Chinese for clearly highlighting the purpose.

Pinyin with tones:

• 为(了) – wèile (4th tone + neutral; written as 为了)
• 身体 – shēntǐ (1st + 3rd)
• 健康 – jiànkāng (4th + 1st)
• 我们 – wǒmen (3rd + neutral)
• 应该 – yīnggāi (1st + 1st)
• 多 – duō (1st)
• 做 – zuò (4th)
• 运动 – yùndòng (4th + 4th)

Things to note:

• 为了 is always wèi le in this meaning (“for, in order to”).
• 应该 stays yīnggāi; there’s no number “one” here, so no tone sandhi on 一.
• 运动 is two 4th tones; make sure the second 4th tone (dòng) falls clearly after yù.