What energy production process provides majority energy for muscle activity?

The majority of energy for muscle activity is provided by the process of aerobic respiration, which utilizes oxygen to convert glucose and fatty acids into adenosine triphosphate (ATP). During prolonged or intense exercise, muscles also rely on anaerobic respiration, which generates ATP without oxygen, but this process produces lactic acid and is less efficient. Overall, aerobic metabolism is the primary source of energy during steady-state activities, while anaerobic pathways are utilized in short bursts of high-intensity efforts.