I had to do this too when i was in middle school;
Number 1, I said that their are many local gyms and fitness centers, healthy restaurants, and clinics that help your health, and one way you can say that you are experienced with one of them is by going to a gym or eating at a certain place before, or even shopping at a clinic.
For number 2, you can motivate yourself past and distractions by staying positive, paying attention by putting more focus on what your working on, eliminating distractions like your cellphone or devices, or anything that is unnecessary for what you are working on, and not letting others in the classroom or work environment distract you.
Good luck, hope this helps!! :)
Supplements that 'claim' to promote relaxation and less anxiety include
Gamma-Aminobutyric Acid
L-Theanine
Lemon balm
Passionflower
Melatonin
However, there are more ways to relive or help relieve anxiety and stress like
Meditation
Getting a massage
Taking a mindful shower
Going for a walk
Using your favorite lotion while using your 5 senses
Playing a game, going out with friends, solve a puzzle or logic problems
Do something artsy
Reading
Just taking a break from the situation
Listen to music
Write a letter, write down your thoughts in a diary/journal, talk to someone supportive
I listed some of the main ones that are commonly used but just do something enjoyable. This wont solve your problems or completely make you feel better but it can give you a break which is something we all need at times.
Other things like antidepressants or things for anxiety may be needed if you are constantly feeling this, there could be a unknown disorder your battling through like, an anxiety disorder, or something of that nature.
The main function of the muscular system is to move
