Surefire way to reduce blood pressure without drugs

Almost by accident I've discovered that running temporarily reduces my blood pressure significantly: I've measured by before and after blood pressure 4 times now and in each case it's dropped from around 130/80 to around 115/70 (or less) after running ~2km (~1 mile) (which is around 10 minutes running for me). The effect only lasts a few hours but I'm guessing that running twice a day could help a lot in keeping the pressure down, and thus reduce the damage to the kidneys from high blood pressure. My only problem is that as well as chronic kidney disease, I also suffer from chronic laziness... but I guess it's just a matter of acquiring the habit.