syusaisya to zyunbiundou wo suru.

Here, と means with, not and.

So:

• 主催者と = with the organizer
• 準備運動をする = do warm-up exercises

Together, the sentence means something like (I / we / someone) do warm-up exercises with the organizer.

Why is it not and? Because 準備運動 is marked by を, so it is the thing being done. That makes 主催者と the partner or companion in the action.

If と meant and, the sentence structure would not make much sense here.

準備運動 is a noun meaning warm-up exercise or warming up. In Japanese, many nouns can combine with する to make a verb phrase.

So:

• 準備運動 = warm-up exercise / warm-up
• 準備運動をする = to do warm-up exercises

This is a very common pattern:

• 勉強をする = to study
• 運動をする = to exercise
• 準備運動をする = to do warm-up exercises

The particle を marks 準備運動 as the direct object of する.

That is normal in Japanese. The subject is often omitted when it is obvious from context.

So 主催者と準備運動をする。 could mean:

• I do warm-up exercises with the organizer
• We do warm-up exercises with the organizer
• They do warm-up exercises with the organizer

Japanese often leaves out words like I, you, or we if the listener can figure them out from the situation.

Because Japanese often drops the topic or subject when it is already understood.

For example, a fuller sentence could be:

• 私は主催者と準備運動をする。 = I do warm-up exercises with the organizer.
• 参加者は主催者と準備運動をする。 = The participants do warm-up exercises with the organizer.

But in many real situations, especially in schedules, instructions, captions, or simple conversation, Japanese leaves that part out.

So the sentence is not broken or incomplete in an unnatural way. It is a normal context-dependent Japanese sentence.

By itself, 主催者 does not clearly show singular or plural. It can mean:

• the organizer
• the आयोजzers / organizers

Japanese nouns usually do not change form for singular vs. plural.

So the exact meaning depends on context. If the event has one organizer, it probably means the organizer. If there are several, it could mean the organizers.

They are usually read as:

• 主催者 → しゅさいしゃ
• 準備運動 → じゅんびうんどう

So the whole sentence is:

しゅさいしゃ と じゅんびうんどう を する。

Not exactly. 準備運動 specifically means warm-up exercises or stretching/exercise done before the main activity.

So it is more specific than just:

• 運動 = exercise

Compare:

• 運動をする = to exercise
• 準備運動をする = to do warm-up exercises

This word is commonly used before sports, PE class, dancing, and other physical activities.

The basic meaning stays the same as long as the particles are clear, but the most natural simple order here is:

• 主催者と準備運動をする。

You could also say a fuller version such as:

• 私は主催者と準備運動をする。
• 主催者といっしょに準備運動をする。

The second version uses いっしょに (together with), which can sound a little more explicit:

• 主催者といっしょに準備運動をする。 = do warm-up exercises together with the organizer

So yes, there are other ways to say it, but the original sentence is grammatically fine.

A learner might briefly think that 主催者と準備運動 means the organizer and warm-up exercises, because と can also mean and.

But in this sentence, 準備運動 is followed by をする, which strongly shows that 準備運動 is the object of する. So the correct grouping is:

• 主催者と = with the organizer
• 準備運動をする = do warm-up exercises

So the sentence is understood as do warm-up exercises with the organizer, not the organizer and warm-up exercises do something.

Yes, especially in contexts like:

• event schedules
• instructions
• activity descriptions
• simple spoken explanations

For example, in a schedule for an event, it could describe one activity:

• 主催者と準備運動をする。
• Do warm-up exercises with the organizer.

In polished standalone prose, Japanese might include more context, but as a short practical sentence, it is perfectly natural.