Concentrated will allow combustion to proceed rapidly and energetically. Consequently, maintaining adequate body temperatures becomes less energetically costly. It was necessary to proceed quickly and energetically. Typically anaerobic metabolisms are confined to areas where it is more energetically favorable. Both pentapedal walking and fast hopping are energetically costly. Despite this unusual and seemingly energetically unfavorable mechanism, such transport does not require ATP. He plays 16th note, 32nd note, and 64th note figures energetically and fluidly within rhythms. Calling is postulated to be energetically costly to anurans in general. Energetically unfavourable and therefore less favorable structures are "minor contributors". Furthermore, having a lower metabolic rate is less energetically expensive. Both echolocation and flight are energetically expensive processes. Its secretion is a complex and relatively energetically expensive process. They decided that a special commission was needed to implement the "most energetically revolutionary" measures. Flight is very energetically expensive, requiring several adaptations to the cardiovascular system. This suggests sperm production is energetically expensive.