It's a hard one between the last two. It would depend on the circumstances and the teen themselves. Generally speaking, teens who have parents that enforce things don't act out but on occasion some have decided to "rebel" and take an alternative route.
However, for the sake of this question, I'm going to say a teen whose girlfriend broke up with him but acts as if nothing had happened.
A good indicator of efficient exercise is a good resting
heart rate. This enables athletes and
health buffs to meet the needs of their body with a slow heart rate. It does not take them much effort in terms of
physical activity whereas those who are out of shape would exert a lot of
effort to complete a task.
