As technologies and sciences are improving, from radio to computers, people nowadays can have a totally different style life than before. More and more devices are invented making people's life easier. It is a good sign that people are improving as time goes on; however, it is also a challenge for youth. Many people, especially youths, now have more beneficial and luxurious life. Youth now gets more relaxing and lazy. As time goes on, it will be huge challenges for youth in 21st century. Health problem is one of the many challenges for youth in 21st century.

To begin with, many of the youths are found to be obesity. Diabetes, hypertension and other obesity-related chronic diseases are becoming more common in youngsters. The percentage of children and adolescents who are overweight and obese is now at its highest. Poor dietary habits and inactivity are reported to contribute to...