Beetroot Juice to Improve Failing Heartbeats
bbc.co.uk
bbc.co.uk
Aside from this, there's some really great research out there that shows a small performance boosting affect for strength training under peak conditions. Some research relating to that can be found here: https://www.biolayne.com/articles/nutrition/beetroot-juice-s...
In terms of anecdotal evidence, I'll drink a serving about 20 minutes before going for a new one rep max on one of the power three (squat, deadlift, bench press), do a little light cardio to get it in to circulation, and have had good results. Some of that is going to be placebo, the belief that it will do that, however, I derive that belief from the evidence presented that something is going on in some beneficial capacity.