Children and young people are moving less and less. In combination with an unhealthy diet, this has led to a sharp increase in overweight and obesity among children worldwide. Very often, physical illnesses occur in adolescence that can be directly attributed to the overweight and obesity. In order to protect children from these consequences in time, a daily exercise unit of 45 minutes is built into their learning. This exercise will take place in addition to physical education classes as part of your child's school day and will be conducted by a teacher. We will examine the children of the participating schools with regard to health-related characteristics.

Inclusion Criteria:

• students in participating schools

Exclusion Criteria:

• none