Agree with Janicecoburn, I started when i hurt my shoulder doing heavy pushs, i restart after a week, doing 80% of my sets very slow reps (8 sec each), of course you'll use lighter waight than before. My buddy even though he saw my results, he will never do it because he feel too ashamed of light weights but hes more like mesomorph, im 6.3ft/100kg 7% bf.
I will keep doing slow reps, no joint pain at all because the form is of course perfect going slow and feel more mind-muscle and athrophy. You just need more focus and patience