AOD9604 -- I've read the research above and used AOD9604 for months. I don't think it works at all. Full stop.
Mots-C -- Some people love it and believe that it works well. My experience was that it did nothing for me.
NAD+ -- Some people love it and believe that it works well. My experience was that it did nothing for me.
SLU-PP-332 -- I love this stuff. It gives me great endurance and assists tremendously with cardio.
Reta -- I love this stuff, too.
I think Reta and SLU-PP-332 would be a good start. Let the Reta do its thing, and take the SLU-PP-332 to help you with your exercise.