Physical effort refers to the amount of energy and strength a person uses to perform a task or activity. This can include actions like lifting, running, or even walking. The level of physical effort can vary based on the intensity and duration of the activity, as well as the individual's fitness level. When engaging in physical effort, the body relies on various systems, including the muscular system and cardiovascular system, to supply energy and support movement. Regular physical effort can improve overall health, increase endurance, and enhance muscle strength, contributing to better physical fitness and well-being.