Mechanical Tension is a KEY to Building Muscle But many people totally misunderstand mechanical tension Mechanical tension isn’t just about lifting heavy. It’s about the force your muscle experiences OVER TIME. You get mechanical tension two ways: • Active tension (muscle contracting) • Passive tension (muscle being stretched) And the part most people miss: Mechanical tension is cumulative. A single max rep produces very high tension — but hypertrophy isn’t driven by one rep. It’s driven by the