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C'è questo tizio che sostiene che per fare i crunch bisogna tenere il sedere leggermente sollevato e che fare il contrario (come tutti quello che ho visto fare, me compreso) sia errato
secondo me farli in un modo o nell'altro non cambia niente. Il punto è sovraccaricare e non farli a corpo libero, che a lungo andare non servono a un tubo
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