All muscles contract from nerve signals. The stronger the nerve signal, the more powerful the muscular contraction. The brain must tell the muscles how hard to contract through the spinal chord. This is where the saying, “mind over matter” comes from. The mind muscle connection is what separates beginners from more advanced weight trainers. Thus, it is important to make that “connection” when you are training.
This can be accomplished by knowing how to fully work each muscle– you need not know all the technical terms, but how to train each muscle group. While trying to lose weight, it is imperative to learn as much as you can about nutrition, training and human physiology so you do not get hurt and gain as much as you can from your workouts.