How long do you have to lift weights to become buff?

Answer 1

Since you do not want to damage the growth plates on the ends of your arm bones and leg bones, you would be better off lifting every other day with weights that you can do for 20 to 50 repetitions before exhaustion. It is important not to max out your weight, but for bulking up, you do want to lift to exhaustion, that is, the point at which you strain with all your strength but cannot lift the weight any longer. BE SURE to warm up for 15 minutes with light weights and 30-second stretches before you start with serious weights!!!

Keep the muscle moving or rub it to avoid lactic acid buildup (shich causes sore muscles), then do another repetition to exhaustion. Finish with a third rep to exhaustion, or until you muscles feels "pumped up". Warm down with much lighter weights long enough to move the lactic acid out of the muscles, say, 10 to 15 minutes or longer.

An hour per muscle group is plenty at age 15.

Answer 2

just exercise every muscle in your body to the point of exhaustion get lots of protein and rest