Avoid those back problems by trying not to slouch in chairs at work and at home. Doctors are starting to notice an increase in back problems among children, teenagers and people in their 20s. The laptop and a more sedentary lifestyle encourages you to plop down anywhere bending forward rather than sitting at a table.
Some basic guidelines for sitting. Ensure your feet are on the ground and your ankles are at 90 degrees. Your knees should be very slightly higher than your hips and you should be able to reach your laptop without having to lean forward. If you have sit all day then try a roll up towel at the base of your back to support you and good luck getting your teenager not to slouch. Also try and get up and walk around at least every 2 hours.