Answer:
volleyball serve. you only need to know how to do that for volleyball and no other sport
Explanation:
Weight training is one of them
Being physically active can increase ur chances of living longer and it reduces ur health risk. For the mental thing more focus and motivation. Being socially active can give u a more positive outlook on life
It honestly depends. If this is you, or a friend, I would suggest to see a doctor to be sure because they are the only ones that can make a professional diagnosis and provide the best advice.
My input would be: either a coping mechanism or hallucinations.
Either way, it's nothing to be ashamed of and the sooner you seek medical advice, the sooner you can get a legitimate answer.