Had a torn meniscus which flared up on me three times before I had it scoped on March 7. Was out for three weeks but started PT after the second week. Went back to work on light duty and continuing PT. The strengthening exercises are important and should be continued forever. Have been using sponge type knee pads for seven years now. Don't think I could kneel on concrete for any length of time without them.
When we are young we don't always think of the long term effects of punishing our knees, backs or shoulders. Just remember it will always catch up to you. Your body is not indestructible it has its limitations. If you feel you need a second hand with a heavy part then get it.
I have three friends with shoulder injuries, two of which are essentially disabled because they have limited movement in there arms due to work related accidents. The other has been out for two years and is just getting around to going back if the doc allows it. Being out for months or years will hurt you financially. And if you have a family it will be much worse.
Don't be a hero with the i can do anything mentality. Your body will tell you differently.
I,m 55 and been at this since trade school in high school, so that's about 37 years. Yes I think an Corona or two is in order about now.