All my life I’ve sweated profusely when training. Also, my sweat has always stung my eyes. I’d also notice that my camouflage clothing would show a white pattern after long marches, etc. I just figured this was a fact of life and always drank a lot of water when training and afterwards.
According to an article I recently read: “If your eyes sting when a drop of sweat gets in your eyes, you are losing too many electrolytes BECAUSE you have lost too much water. Your body must now shed the electrolytes (that keep you alive). They are getting too concentrated because of the loss of the water in your body’s effort to cool itself. Your electrolyte balance is now seriously disrupted, and even with the shedding of electrolytes, you will be at risk.”
The author recommended using SmartWater. I thought this was a gimmick, but used a bottle during my last workout.
I felt immediately better the next day and have added this as a staple during workouts. Refreshed actually, in ways different from usual. (Like I noted, I hydrate extensively when training and afterwards, so it wasn’t a function of my not drinking enough water.) It seems to help quite a bit for recovery.
So if your eyes sting like mine do every time you do something that causes you to sweat a lot, you might want to pick up some SmartWater. (They sell it by the case at Trader Joe’s for a pretty good price.)