I've had both rupture- same injury as yourn.
I think some of the recovery time depends on what type of repair you had. Both of mine were repaired using a cordial button.
My left one, it took a full 3 months to be completely released. The bone has to heal around the tendon - which is six weeks of healing. After that it was rehab once a week to get the range of motion back. I was back to lifting after 3 months. Competed in a powerlifting meet about 3 months after that and had regained most of my strength that I lost.
My right one, I tore the bicep tendon and an elbow ligament. Due to the ligament being repaired, it was a solid 6 months before I could do really anything. I was in a sling and then a brace for the full 6 months. I also need a full replacement of the right shoulder so I never got back full range of motion.
I've known several people who have had different surgeries and were back quicker than I was. My doc went with the cordial button because I was a competitive powerlifter and he wanted to make sure that the surgery would hold up to what I was going to put it through.
I don't know about collegen. I know it is claimed to help with joint pain but (spitballing this) I wouldn't think it would help due to the injury not actually being in the joint.
Three things I highly recomend are:
- Keep working out. I bought a safety squat bar so I could squat one armed. I used a lot of machines to workout my good arm. The workout will stimulate natural growth hormones and testosterone production which will help to keep you losing as much strength in your injured arm and speed healing. Post surgery would be a good time to supplement with HGH and steroids - at an intellegent level.
- Make sure you are getting plenty of protein in your diet. It is slow digesting and can provide you a more constant source of energy to provide for healing.
- Listen to you PT doctor. Ask him if you can do the exercises at home or if there is a limit you should do.
The two best pieces of advice I can give you that are unrelated to healing is:
- Pillows are your friend. Prop one under your arm to get comfortable.
- Stretchy pants are the way to go. I had a difficult time buttoning my pant. I bought a couple of pairs of stretchy old man jeans. They were a life saver.