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- Nov 17, 2015
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The weight machines you find in gyms, in some cases for the less than hardcore, have replaced free weights. I still like a mix of both for my workouts.
The history on those "machines" is interesting. On the one hand, they opened up gyms to everyone, no longer requiring a trainer or help to avoid injury. They led to the explosion of gyms in the 80's. Learning is simply getting on the machine, looking at 3 pictures, and off you go. They are also great for rehabbing, or for anyone with injuries or instability that needs extra support. Or if you can't simply start with a 45lb bar (which is a lot of people). Or if you are intimidated walking into a room full of grunting dudes who want to offer you unsolicited advice (which is not just me).
On the other hand, machines are not nearly as effective as free weights. By isolating the muscles the rest of the body isn't involved, so less real strength or growth is developed. Think of a bicep curl, for example. You don't do those in isolation in the world like a machine. Your entire arm, shoulder, back, are also involved, and you're conscious of keeping proper form to get the move right and train the muscle to do the thing. Compare doing squats with a barbell on your back vs. the leg press machine.
But on a machine? None of that, only the bicep engages - less benefit. Sure, you're also far less likely to hurt yourself.
So, the free weights are better for the individual that wants to develop strength, but the machines are better at attracting everyone else that would never pick up a weight otherwise. (They are also very good for gym owners who want to run a shop with entry-level staff).