Inette,

This is probably a matter of normal heat acclimation due to increased exercise, and unrelated to diet.

When you increase your exercise or are exposed to a warm environment, your body compensates by reducing the concentration of sodium and other minerals in your sweat, so your sweat will taste less salty.

Heat acclimation takes time--7 to 10 days, and your body will lose heat acclimation if you stop exercising or aren't exposed to heat for 1 to 3 weeks.

Of note is that people with cystic fibrosis lack the ability to reduce the salt content of their sweat due to a defect in their cellular membrane chloride channels. This can lead to hyponatremia (low sodium levels). Some parents have actually diagnosed their child's cystic fibrosis by tasting the saltiness of their sweat.

Basically it just means you have low electrolyte/mineral/salt levels.Which also means your body will be less efficient at absorbing water and leads to dehydration. Dehydration makes your metabolism less efficient, and impedes fat burning. It also leads to muscle cramps, headaches and dizziness. without sufficient sodium and potassium your body can't maintain your blood pressure, thus dizziness. So If you want to do a lot of cardio or you do cardio in hot environments make sure to replenish your electrolytes during the training.

Table salt or special salts are bad for this. Its better to use sea salt or better yet rock salt. As they are a mix of sodium-chloride potassium-chloride and iodine-chloride salts to name but a few and your body needs them all. In fact if your doing very intensive training you should invest in a mineral complex geared towards replenishing the lost minerals, these normally also include magnesium which is also very important to prevent cramps.

Also note the mineral drinks in most fitness studios aren't actually geared to replenish your lost minerals.

I actually noticed the same thing last night at the gym when sweat ran down into the corners of my mouth, tasted like regular water. Don't know the cause of it, but definitely less icky!

i had the same situation, i recently went on a diet no food after 5pm, well actually i didnt stick to it maybe a small snack.I ate little food most of it is healthy.2 months have passed and i noticed a I HAD LOST SO MUCH WEIGHT. The place that i worked is in the hills so every morning at 6 I catch the bus and at the road when i reach my destination i walk up it takes about 50 mins and I have been doing this everyday.After work I have an urge to drink just water i take about 5 cups of water and im full.later on at work when i sweated i could no longer taste salt it was just water...Now i have switched my diet to just lemon water after walk and I still cant taste salt in my sweat.