What does Buddhism teach about energy?

I am interested in what Buddhism has to say about the flow of energy in our lives. (For clarification, by "energy" i am referring to the concrete aspects of stamina/fatigue, feeling tired or having the strength to go about your day. I realize the topic of energy is broad, and dealt with in different yogic, para-psychological or pseudo-scientific contexts, but those aspects are out of the scope of my question). To the best of my knowledge, the extent of Buddhist commentaries regarding energy use concepts like indriyas/balanis and not least viriya. For instance, in AN 6.55 we can read that: >...when energy is too forceful it leads to restlessness. When energy is too slack it leads to laziness. So, Soṇa, you should apply yourself to energy and serenity, find a balance of the faculties, and learn the pattern of this situation. https://suttacentral.net/an6.55/en/sujato In SN 48.43 Buddha elaborates on the faculty of energy: > The faculty of energy is the power of energy, and the power of energy is the faculty of energy. https://suttacentral.net/sn48.43/en/sujato Possibly related, we can also read about piti, a feeling of energizing rapture (if you will) as a dhyana factor: >Here, secluded from sensual pleasures, secluded from unwholesome states, a bhikkhu enters and dwells in the first jhāna, which consists of rapture and pleasure born of seclusion, accompanied by thought and examination. https://suttacentral.net/an5.28/en/bodhi Seeing as tranquility in Buddhism is - arguably - given precedence over energizing i am assuming that the latter is somewhat subordinate, and dealt with to lesser degree than other Buddhist topics. Or am i wrong? What else can Buddhism teach us about energies? (This is a reference request.)