i play the trumpet, it requires a lot of stomach strength
Yea I can imagine, it is a wind instrument so I assume you use your diaphragm a lot. 
yes i do, but it is just so beautiful to listen to, so i dont have any regrets
History tells us that the origination of the trumpet started in 1500 bc from animal horns
what was it used for in those times?
Well it was completely crafted yet, people of that time found that animal horns opened up at both ends and with pursed lips, blowing into them made a sound. Since language was limited back then that was often used as a form of communication; the trumpet became more complex over time. 
friom movies i guess they were mostly used for war cries 
Have you mastered double tonguing and single tonguing?
yes i have, it was chalenging 
I briefly read about it, they say patience is key to mastering the skills.