Physics
Inertial Resistance in Athletic Performance
Quick fact
Inertial resistance is the force you must overcome just to move your body, and it depends on your mass and the speed of movement.
Why this is interesting
Ever noticed how it feels harder to start running than to keep moving? That’s inertia at work—your body resisting change in motion.
Read the full explanation
Understanding Inertial Resistance in Athletic Performance
When an athlete starts running or changes direction, their body resists these movements due to inertia. This resistance is a result of the athlete's own mass trying to remain in its current state—whether stationary or moving. Overcoming this resistance requires energy, which impacts performance and efficiency.
A deeper explanation
Inertial resistance is directly tied to Newton’s First Law of Motion, which states that an object at rest stays at rest, and an object in motion stays in motion unless acted upon by an external force. In athletic performance, this means the athlete must exert energy to overcome their own mass when accelerating or decelerating. This resistance affects movement efficiency—athletes who can minimize unnecessary inertial forces (e.g., through proper technique) will perform more effectively and conserve energy during activity.