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In this brief excerpt from the YouTube video, Speaker A stresses that a proper resistance‑training set must end with the muscle feeling tense, hard and exhausted. He argues that if a set does not generate noticeable muscle tension, the set was essentially ineffective, and he criticizes the common habit of performing “cute” light series where the lifter stops after 8‑9 reps and feels relaxed, as if nothing happened. He contrasts this with a truly intense set that leaves the athlete visibly exhausted and the muscle “rock‑and‑roll” tense. Speaker B interjects with a short, humorous comment about a “pile of stones waving,” serving as a light‑hearted aside.
