Don’t sit around and wait for your tendinitis to get worse—start taking care of it the day you notice it. Prevention is always best, but immediate correction will save you a lot of time, pain and lost training.
The first step when you start feeling patellar tendinitis is to figure out what changed—did you jump into way too much training volume and/or intensity too quickly? Did you add unfamiliar exercises you’re not conditioned for, especially jump training? Did you change the way you’re squatting or switch shoes?