Newton proposed that rather than force being the cause of an object’s velocity, rather it was the cause of the change in the object’s velocity.

Newton vs. Aristotle.Our intuition often aligns with Aristotle, suggesting force is needed tokeepthings moving. However, Newton''s First Law states an object in motion stays in motion unless acted upon by a force. Forces are the cause ofacceleration(changes in velocity), not velocity itself.

Everyday examples.When we push a car, it accelerates. When we stop pushing, it decelerates due to friction and air resistance (forces). If those forces weren''t present, it would continue moving indefinitely. This distinction is fundamental to understanding biomechanics in sport.

Training implication.Understanding this means training should focus on improving the ability tochangemotion rapidly – accelerating, decelerating, or changing direction – which directly relates to applying forces effectively. It''s not about just moving, but about changing how you move.