An adolescent may grow several inches in several months followed by a period of very slow growth, then have another growth spurt.
This can make it harder for teens to fall asleep early.
Examples of aerobic activities are running, swimming and dancing.
In a subsequent set of videos, the woman said she boarded the plane at 6AM with her family and sat in separate seats.
Some activities may need to be changed or adapted, and some may be too risky depending on the condition.
This change is likely due to the brain hormone melatonin, which is released later at night for teens than it is for kids and adults.