Ricecakes. Cat Anderson's method first starts out with long tones. He gradually builds to range increases, but then instructs after finishing a particularly grueling exercise to either go back to long tones or to take a 10 or 20 minute rest. There are many methods to achieving Cat's point, but his real message is not to allow your lips to fatigue. What do I believe Recovery time is? That depends. As long as you still have control and accurate slotting of slurs, octave exercise and phrases, the time it takes to put down your horn pet the dog, walk to the sink to empty the spit valves, etc. is all the Recover time you need. And yes if taking on a particularly challenging passage with control yet lost, the perhaps a 10 or 20 minute rest as suggested by Cat. But, if you start losing control of slotting, you are BEGINNING to fatigue and becoming dangerously close to producing strain. If you get to this phase. Stop. Step Away from the Horn. Do not play that horn until the next day. Then have at it once again. So in the situation where strain sets in, Recover time should be 24 hours.