zyunbiundou to suibunhokyuu wo suru.

Because 準備運動と水分補給 is being treated as one combined noun phrase: warm-up exercises and hydration.

So the structure is:

• 準備運動 = warm-up exercises
• と = and
• 水分補給 = hydration / fluid intake
• をする = do

In other words, Japanese is marking the whole combined phrase as the object of する.

A close literal breakdown is:

• [準備運動と水分補給] をする
• do [warm-up exercises and hydration]

You do not need を after each noun here.

Here, と means and.

It connects two nouns:

• 準備運動と水分補給
• warm-up exercises and hydration

This use of と is for listing nouns in a fairly definite, complete way. It sounds like these are the specific items being named.

So this sentence is not saying something vague like things such as warm-up and hydration. It is straightforwardly naming both actions.

Japanese often uses する with nouns to express actions.

Both 準備運動 and 水分補給 are nouns, but they refer to activities. So Japanese naturally says:

• 準備運動をする = do warm-up exercises
• 水分補給をする = hydrate / take in fluids

This is very common in Japanese. Many action-related nouns combine with する instead of using a standalone verb.

So even though English might prefer different verbs like warm up or drink water, Japanese often packages the idea as noun + をする.

する is the plain/dictionary form.

You might see this form in:

• instructions
• schedules
• headings
• captions
• casual speech
• written explanations

If you want to make it polite, you would say:

• 準備運動と水分補給をします。

So the difference is mostly about speech level, not meaning.

It is a noun.

It means warm-up exercise or warming-up movement/activity. In the sentence, it becomes an action by combining with をする:

• 準備運動をする = to do warm-up exercises

This is a very common Japanese pattern:

• noun + をする

So even though the whole phrase behaves like an action in translation, 準備運動 itself is not a conjugated verb here.

Not exactly. 水分補給 is broader and a little more formal or set-phrase-like than simply drink water.

It literally means something like:

• replenishing fluids
• hydration
• taking in fluids

So it can include:

• drinking water
• drinking sports drinks
• generally making sure your body gets enough fluids

If you simply want to say drink water, that would more directly be:

• 水を飲む

But 水分補給をする is extremely natural in contexts like exercise, sports, summer heat, and health advice.

Japanese often omits the subject when it is obvious from context.

So this sentence could mean things like:

• I do warm-up exercises and hydrate.
• We do warm-up exercises and hydrate.
• You should do warm-up exercises and hydrate.
• Do warm-up exercises and hydrate.

The exact subject depends on the situation.

This is very normal in Japanese. Sentences often focus on the action itself, leaving the listener to infer who is doing it.

Yes, depending on context.

Even though する is the plain dictionary form, Japanese often uses plain forms in written instructions, routines, or labels. So this could appear in something like:

• an exercise checklist
• a training plan
• a health guide
• a classroom instruction sheet

In that kind of context, it can feel like:

• Do warm-up exercises and hydrate.

So the plain form does not always mean casual conversation only. It can also sound neutral and instructional in writing.

Because once two nouns are joined by と, they can share the same verb.

So instead of saying:

• 準備運動をして、水分補給をする

Japanese can also say more compactly:

• 準備運動と水分補給をする

This is similar to English saying:

• do warm-up exercises and hydrate

rather than fully repeating everything.

Japanese often prefers this kind of compact phrasing when the structure is clear.

No. Standard Japanese is normally written without spaces between words.

So the usual written form is:

• 準備運動と水分補給をする。

If you see spaces, they are usually added for learners to make the sentence easier to read.

So the spaced version is a teaching aid, not standard native-style writing.

You can use that as a grammar gloss, but it is not the most natural English translation.

A literal breakdown helps show the Japanese structure:

• 準備運動と水分補給をする
• do warm-up exercises and hydration

But natural English would usually say something like:

• Do warm-up exercises and stay hydrated.
• Warm up and drink fluids.
• Do your warm-up and hydrate.

So the literal translation is useful for understanding the grammar, while a freer translation is better for natural English.

Yes. That is also natural.

The difference is mostly in style and nuance:

• 準備運動と水分補給をする

  • more compact
  • presents both as a combined set of actions

• 準備運動をして、水分補給をする

  • slightly more step-by-step
  • can feel like first do warm-up exercises, then hydrate

So both are correct, but the original sentence sounds neat and list-like.