What percentage of total energy is utilized during normal breathing?

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Between 25% and 50% of the total energy consumedFrom 50% up to 75% of the overall energy usedApproximately 15% to 20% of the total energy expendedOnly 2% to 3% of the total energy utilized

Explanation

During normal respiration, the body uses about 25% to 50% of its total energy expenditure. Other values such as 50% to 75%, 15% to 20%, or 2% to 3% are not consistent with typical energy usage during breathing.