Levers do not make you stronger. A lever helps you do more work with the strength you already have. A lever is a basic machine.
All tools are combinations of the basic machines.
Levers are all over your house. And You Can see how they work with today's experiments. Either way you say it, levers work the same way. All levers have 3 parts, or 3 things we can find on them. The fulcrum, the load, the effort and of course the lever, itself.