shusaisha to junbiundou o suru.

direct object particle

Breakdown of shusaisha to junbiundou o suru.

• と: companion particle
• する: to do
• 主催者しゅさいしゃ: an organizer

Questions & Answers about shusaisha to junbiundou o suru.

What does と mean here? Does it mean and?

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.

Why is 準備運動 followed by を, and then する?

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.

Who is doing the action? The sentence does not say.