In muscular strength guidelines, the first time component suggests training until what occurs?

• A. Muscle fatigue
• B. Cardiac fatigue
• C. Neuromuscular fatigue
• D. Fatigue only after 60 minutes

Answer: (A)

In muscular strength guidelines, the cue is to train until local muscular fatigue occurs—the point at which the working muscle can’t perform another repetition with proper form. This signals that enough motor units have been stressed and enough work has been done to drive strength adaptations. It’s about the muscle’s capacity, not the heart or systemic endurance; cardiac fatigue isn’t the limiting factor in typical resistance sets, and waiting for fatigue after a full hour isn’t practical or part of standard strength programming. Neuromuscular fatigue plays a role, but the practical stopping point you aim for is the muscle reaching fatigue.