我想把肌肉增大 要點樣鍛鍊先可以有呢個效果?

Many trainers will not recommend a 14 years old to lift weight, and do not train one part of your body, it will make your muscle imbalance. I would
suggest you for now, just keep it simple, do some cardio exercise to keep your body fat low, and do some push ups and pull ups, just like in the PE class.

When you are 16 or so, you can start to use weight training to build the muscle, keep in mind that you should train the entire body, that will make you look
nice than just train one part of your body.

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