move your arms
The Italian phrase 'muovi le braccia' is used to express the action of moving one's arms. It is a command, so it is often used in instructions or when giving advice. The phrase is in the informal 'tu' form, which is used when addressing someone you are familiar with or who is of equal or lesser status.
Please, move your arms while I explain to you.
This is a sentence where someone is asking another person to move their arms during an explanation. It could have been said in a context where the person explaining is teaching a dance, a workout routine or a physical technique.
She had to move her arms to avoid falling.
This sentence describes a situation in which a woman had to move her arms to protect herself from falling. The girl could have tripped up on something and in doing so, she quickly moved her arms for balance.
Move your arms, it will help you maintain balance.
In this example, someone is giving advice to another person to move their arms in order to maintain balance. This might be used in various contexts, such as teaching someone to walk on a tightrope, surf, or any other activity that requires balance.