Olympic trainers take these systems into account. A long-distance runner should use aerobic metabolism for as much of her ATP as possible. To ensure this, she’ll be tested on a treadmill to measure her threshold of aerobic metabolism.
Honeybees make propolis by collecting the secretions of trees and other plants where they live; thus the make-up of propolis varies depending on the plant life around. Researchers have found the propolis of Brazilian honeybees to be particularly potent when it comes to protecting teeth.