This question demands
far more than a paragraph or two, and the answer is both yes and no.
In general, the same
muscles are involved when using dumbbells and machines as in barbell
movements. Most machines also lock you into their linear biomechanical
grooves, which can be used to your advantage when recovering from an
injury. Machines are good to use for your bodybuilding workout when you want to focus on the prime
movers and take them to failure without being limited by the
stabilizers, whether they are performed exclusively or after more
free-form movements.
Machines limit the
development of stabilizer muscles, however, which is why free weights
have long been known to provide strength and endurance that's more
transferable to free-form athletics, sports and daily life. Another
downside of machines is the risk of injury associated with over-reliance
on machines that lock you into an unnatural groove during your
bodybuilding workout. Despite all the
claims of equipment manufactures, there's no perfect, biomechanical
correct machine for every bodybuilder .
Read more about the effectiveness of dumbbells, machines and barbells ...
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