ISSA Trainer Practice Exam 2025 – Complete Study Resource

A lever that operates like a seesaw is classified as a first-class lever. In a first-class lever, the fulcrum is positioned between the effort (the force applied) and the load (the weight to be moved). This configuration allows for a balance of forces on either side of the fulcrum, resembling the way a seesaw pivots at its center.

In a seesaw, when one person applies force to one end, it lifts the other end simultaneously. The relationship between the effort and the load is crucial in first-class levers, as it allows for the possibility of mechanical advantage or a balanced state. Examples of first-class levers include not only seesaws but also simple tools like scissors and crowbars.

Understanding the mechanisms of first-class levers is essential for trainers and fitness professionals, as it applies to various exercises and movements that require balance and coordination, replicating the dynamics of real-life movements and activities.