Strength training?

okay i am a little overweight i am 14 and i just want to build more muscle around what i already have. I would be doing a majority in my home i have dumbells and a bench so what are some good excersises? weights and detailed explanation please
Answer:
bench presses

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Bench presses, bicep curls, and weighted crunches( crunches with weight on your chest)to build muscle mass lift i weight that you can only do about 10 reps of, do 2 sets of 10 reps, the key is the to go slowly but to change the transition from down to up quickly.

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Here's a great exercise Directory, ExRx.net:
http://exrx.net/lists/directory.html...There are detailed explantions, animations, different variations.At 14 your body is still changing. Work out and have fun.

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