The rda for potassium is 4700mg and always overlooked by most people. I think largely because docs, for some reason seem to think we get enough from food but we dont. I was logging my food and tracking nutrients for a long time, I was always coming short on potassium using the RDA as a guideline, which we all know if usually VERY conservative.
When I started focusing on potassium rich foods and supplementing potassium within 2 weeks I noticed a huge difference on my performance in the gym (both strength, endurance and recovery between exercises), my recovery after a workout and even my HRV average increased. A lot of aches and pains also simply went away.
One of the best ways I have found to get more potassium, aside from eating more potassium rich foods, is by taking potassium ascrobate. That way I get vit C as well(700mg pot/4g ascorbat per teaspoon) as potassium. I cant use it as my sole source of vit C because I dont want to consume too much potassium.