>>1075554 >Dave here, I feel your pain. I used to have a 306W FTP (I'm 5'9, 137 lbs) until my knees started to fail after a few months of too much exertio- it's been four months of recurrant, unending knee pain that has almost entirely shelved any and all training. I went from 200 miles of Zone 3 training per week to almost completely nothing since then and including now. Your options are to start physical therapy and rehab immediately, I mean it really fucking sucks and is tedious, but if it doesn't feel like you have a knife in your knees, then you haven't torn anything, and the culprit is most likely sustained overuse inflammation. It is imperative that you adopt a proper stretching, warm-up, cooldown, and RICE (rest, ice, compresssion, elevation). There is hope for you if you IMMEDIATELY see a physical therapist and IMMEDIATELY get on a serious, time-intensive recovery program (plus, anti-inflammatories, like tumeric pills and NSAIDS0- if you are this serious about not losing your aerobic capacity, take up swimming (which is awful too, speaking from first-hand experience).
I know exactly what you're feeling but you also haven't been sideswiped by a cager and you aren't paralyzed. Plenty of pro's have gotten injured or even nearly killed very early in their careers and still managed to become worldly talents- read up on Esteban Chave's near career-ending crash when he was 22, for inspiration.