Clarke Technical Studies for Trumpet, First Study, Exercise 1 play-along video with music notation.
Do not exceed the dynamic markings indicated in these exercises to avoid fatigue and strain to the lip muscles. Permanent injury to the embouchure may occur if the tone is forced.
Practice each exercise eight to sixteen times in one breath, keeping the lips and fingers flexible. Tighten the lips slightly in the ascending lines, loosen them in descending lines.