You’ve heard of the “impossible” 4-minute mile right? Until Roger Bannister broke the barrier (3 minutes 59.4 seconds to be exact) on May 6, 1954, it was unthinkable that a human could run a mile in under 4 minutes (wish those people could see Usain Bolt).
So let’s think about ‘heavy lifting’ outside of the metaphor for one paragraph. You, yes you reading this - you can only lift as much as your muscles and tendons allow. The only way you can exceed your core strength, your inherent strength, is with a lever. And with the proper lever you can move heavy using less force; you can propel faster despite less speed; and you can send an object a lot further with less push/pull.