Mar
You're only 13, so you might want to wait a year and change to start lifting. Let your body grow a bit more and get stronger.
But to your question: Definitely. Using -free- weights (not machines) is the ideal way to build muscle. When starting with weights, begin slow (light weight) and gradually go up in time. You'll be really sore for the first week or maybe a tiny longer because your body will be using muscles that it never has before, but after that you won't get sore. Free weights will help you get bigger and should help you put on some weight. Don't forget to eat your protein. 8-10 reps build mass, 12-15 reps tones you up.
Answer:
be careful with weights at your age… lifting too much can stunt your growth. also, dont try to lift a bunch of weight really swift… you gotta build your muscle up gradually and condition your body to the new exercise. my dad's been lifting weights since he was a teenager, and when my 13 year old cousin tyler started lifting [he was trying to lift more than his friends, so hed just keep adding weight] my father told him it was a really bad idea to do it that way. make sure you can lift the weights fairly slowly [you can't let your momentum lift them, you actually have to] and do reps of 10 or 15.
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Yes weights with a high protein high good Carb diet will help you gain weight.
But im sorry to state this and i know you dont want to hear it, your way to young to be lifting weights. You need to wait until you're a least 16 even 17. It could actually be harmfull to your body.
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give it 2 more years before working out…it will compress your bones if your not fully grown! but if you continue to work out and you need weight…buy NITRO TECH HARDCORE from GNC..give it a try..
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yes, working out with weights will help build muscle mass. work out every other day and don't try to lift too much too soon.