Typically sport drinks have carbs, salt, potassium chloride, and magnesium. Mineral waters have salts, potassium and magnesium. You can buy potassium chloride, and magnesium citrate powder and leave sugars and salts out or reduce them. I haven't looked, but there might be already products that suit you.
Boom, magnesium is another important factor in balancing electrolytes for cardiovascular health. I would check out magnesium taurate instead of or in addition to the citrate. It seems to have a stronger association with managing blood pressure. Ideally one would get the minerals from a good diet, but I agree supplements are better than sports drinks.
This is a cool idea, thank you! I have not experimented with using magnesium specifically in any way, but have heard that it's a useful supplement to take.
Typically sport drinks have carbs, salt, potassium chloride, and magnesium. Mineral waters have salts, potassium and magnesium. You can buy potassium chloride, and magnesium citrate powder and leave sugars and salts out or reduce them. I haven't looked, but there might be already products that suit you.