Hi, I'm Denise Druce for LIVESTRONG.COM. Let's look at a great weightlifting routine for teens. We'll look at the upper body, lower body and core exercises to make you strong from head to toe. For a teen to start a body building program, it's best to start with lighter weight and more repetitions, especially if your body is still growing. And then, over time, you can begin to increase the weight. So, choose some basic exercises for upper body, lower body and for core,and i'll show you a few. So, let's look at a bench press. Lying on your back, you can put your feet on the end of the bench, bring dumbbells right to your shoulders, maybe your arms in a 90 degree bend. And then, push up, bringing the dumbbells together on top. Make sure to keep your core strong an lower back in neutral alignment. A great lower body exercise is the good, old squat. So, just like you're siting in a chair, bending from the hips, getting down into the heels. You can either hold your dumbbells at your side, or bring them up to your shoulders. And again, you're going to want to start with lighter weights, more repetitions and work your way up to heavier weights. Any body building program includes lots of abs, let's do the bicycle. Bring your knees right up over your hips, fingertips on the back of your head and then, just begin the bicycle. To make this harder, you can go faster and you can take both of your legs out farther away from you. Keep your abdominals in tight and do as many as you can. That was a look at a weightlifting routine for teens. I'm Denise Druce for LIVESTRONG.COM.