How is the respiratory system of insects (with its independence between circulation and respiration) related to the motor agility of some species of this arthropod class?

How is the respiratory system of insects (with its independence between circulation and respiration) related to the motor agility of some species of this arthropod class?
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Even having low speed and low pressure circulatory system, since it is a lacunar (open) circulatory system, insects perform extremely fast and exhaustive movements with their muscle fibers, like wing beating. This is possible because in these animals the respiration is independent from the open circulation. Gas exchange is done with great speed and efficiency by the tracheal system that puts cells in direct contact with air. Muscles can then work fast and hard.
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