I have had a blood test with high potassium

No experience, just a lot of knowledge. There are 4 main things that can lead to an unacceptably high serum potassium level. 1. Kidney failure. Responsible for around 65% of all hyperkalemia instances. Your GFR rules that out. Like outta the park out. Next, 2. Drugs, mostly inpatient quality diuretics and ACE inhibitors, if you need 'em, you'll know what they are. These instances usually resolve with time on the drug, and mostly aren't too severe. 3. Mass tissue destruction: Getting beaten to a pulp, hit by lightning, burned, or crushed by a building. These involve death of skeletal muscle cells on a massive scale. Rare but the most severe. You'd think the damage itself would be the problem here but ironically it IS the rise in serum potassium that winds up endangering the lives of these patients. 4, Actual potassium. Steer clear of NuSalt and other sodium alternatives.

In the body, each cell is like a pool of potassium. When that cell wants to do something, like move, it has to release some of its contents into its surroundings. So serum potassium goes up slightly. If something comes along and bursts the cell, ALL of its contents get released and potassium goes up A LOT.

Potassium levels can rise within the ACCEPTABLE range due to strenuous physical activity, losing weight, eating particular foods, especially ones you aren't used to. Even adding more vegetables can increase your intake. A full body massage also releases potassium, which is why a water bottle is recommended as take-along. But, in these cases, as long as your kidneys are functioning well, there is no need to panic. It will come back down fast enough to keep you healthy.

I'm guessing your active lifestyle means you'll have slightly higher potassium than average, and that's okay. If it really concerns you, a small mug of licorice tea 2-3 times a week can help (Don't overdo it though, hypokalemia isn't good either)