i had similar results. Right now in fact. I have started to develop a tendonitis type feeling in my rectus femoris tendon… generally due to lack of strength in the RF. I squatted for the first time in months on monday, and I have been unbelieveably sore. So sore that Im not sure if I will even be able to run tomorrow!
RF tendon pain could also be due to inflexibility, so I have been stretching too btw