Don’t Confuse the Force–Velocity Curve with Newton’s Second Law (2025 Update)

In 2014 I wrote about the force–velocity curve and why controlled repetition speed matters. Since then I’ve seen the same misunderstanding come up repeatedly: people conflate the muscle force–velocity relationship (a capacity limit) with Newton’s second law (a requirement to accelerate a mass). They are different ideas that answer different questions—and when you combine them […]