Question: how much weight should a 15 year old boy lift?
Answer: A good rule of thumb is to start with a weight you can easily lift 10 times, with the last two repetitions being increasingly difficult. For some teens, this might be 1 pound to 2 pounds. If you are strong and fit, you might start at 15 pounds to 20 pounds. When lifting, move the weights in a smooth, steady motion.