Answer:
What is broken if you say its name?
Angels and pilots earn these.
Small, containing light, You'll need it in the dark, It will provide that spark, and shine into the night. Will light up any pyre, 'Cause it can help make a fire.
It can be cracked, It can be made, It can be told, it can be played. What is it?
What you become during a workout?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?