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In this short instructional video, the speaker warns that the pec deck (peck deck) exercise places the shoulder joint in a harmful position—abduction combined with external rotation—leading to discomfort and a high risk of injury when loaded. He emphasizes that performing the movement under load is unhealthy and will likely cause problems. As a safer alternative, he recommends using a fixed‑machine chest fly (crucifixo fixo máquina), which provides the same chest‑development benefits without compromising shoulder health.
