I have to do a lot of playing most days and the powers that be expect me to play at an optimum level of performance. I think I would find this more difficult without a regular warm up practice before I leave for work. Before starting, I find that I like to do some simple breathing exercises to get the ‘engine room’ going.
The studies I prefer, when I pick up the trumpet are the ‘Flow Studies’ by Vincent Chicowicz. I practice a few of them on the mouthpiece alone, also. I make sure I transpose them into all keys! I am a big fan of the Chicago school of brass teaching which descends down from Arnold Jacobs and am indeed a massive fan of the Chicago Symphony Orchestra brass sound.
The famous ‘Flow’ Studies by Vincent Chicowicz
I try not to concern myself with what my playing feels like: EVER! For me, a warm up, is simply to establish the ‘normals’ and to strive for a beautiful sound. As Jacobs himself said, ‘There is only ‘Song and Wind.’