I'm 50 and been highly athletic all my life. I ruptured both quad tendons playing basketball,,, one going up and the other on the bad fall.
Not too much pain or swelling, and thought I would be ok in a few days. Noticed the inability to move the shin forward, so went to the uregent care center.
Got both reattached with only a 4 in scar that is fading fast, and the stitches in the kneecap will disolve. In rehab a few weeks, no swelling and no pain. Already walking on my own. Have only a 90 deg bend but getting more all the time. Both legs feel great and gaining muscle mass back.
This injury is not permanent and doesn't have to be as horrible as you hear.