This
@lukarino said in No real gains on anything more than 40-45 minutes of practice.:
Resting as much as you play (and in short sections).
and this X10
@Vulgano-Brother said in No real gains on anything more than 40-45 minutes of practice.:
Many low impact repetitions help grow our endurance. Clarke Studies are our friend.
You must rest as much as you play with the mouthpiece off the lips to avoid fatigue and bad habits that come from playing when tired. Claude Gordon said, “If you rest properly you can play all day.”