People with high blood pressure are usually advised to lower their sodium intake. Can you instead excercise more to sweat off the sodium, or would the sodium loss be negligible compared to what you can accomplish with your diet? How many grams of salt do you lose if you, say, ride a stationary bike for half an hour? (I know it depends on numerous parameters, but I’m just looking for order of magnitude answer here)
Also, we are sweating constantly whether the skin is wet with sweat or not. Is sodium being secreted in that case as well? Or are the electrolytes staying in the cells and water evaporating directly through the membranes?