The amount of energy and air needed to play the flute will vary depending on the individual player and the piece of music being played. Some pieces may require more breath control than others, and some players may find that they need to use more air than others.
In general, playing the flute requires a steady stream of air that is directed through the instrument's mouthpiece. The player must use their diaphragm to control the flow of air and create the desired pitch and tone. They must also use their fingers to cover and uncover the holes in the flute in order to produce different notes.
The amount of air required to play the flute can also be affected by the size and shape of the player's mouth and throat. Some players may find that they need to use more air if they have a smaller mouth or throat, while others may find that they need less air if they have a larger mouth or throat.
Overall, playing the flute is a relatively moderate activity that requires a moderate amount of energy and air. However, the exact amount of energy and air needed will vary depending on the individual player and the piece of music being played.