I experimented with taking 2 eelctrolyte pills before I started this morning. No need to dssiolve, just swallow like a pill, followed by water - didnt lose as much salt anymore. (I took 2 an hour before my run with plenty of water. You can also take 2 every hour that you workout - I havent done this yet since I dont run with water)

900 laps on the stairs - 95 minutes.