Tale of the Tapenuun:
Sodium (carbonates) 360.0 mg
Potassium (bicarbonate) 100.0 mg
Magnesium (sulfate) 25.0 mg
Calcium (carbonate) 12.5 mg
Vitamin C 19.0 mg
Vitamin B2 Level 500 mcg
Sodium (as Sodium Chloride) 40mg
Chloride (as Sodium Chloride) 60mg
Calcium (as Chelate) 50mg
Magnesium (as Chelate) 25mg
Potassium (as Chelate) 25mg
Vitamin B-6 (as Pyridoxine HCL) 6.6mg
Manganese (as Chelate) 1.6mg
I spoke with Dr Clyde Wilson, PhD today (http://www.drclydewilson.com), sports nutrition guru to get his take on nuun vs Endurolytes, and here's what he said.
Given that we sweat out 600ml of sodium/L of sweat/Hour, with nuun having more sodium than Endurolytes, nuun would be better for cyclists because you need to drink more water to have them be effective. This making more sense simply because you can consume a lot more fluid on a bike ride/race than you would want to running.
However, for runners, since you would need less fluids to get the benefits of Endurolytes, they make more sense in that application because of their capsule form, ease of portability as well as being easily digestible.
Wilson also said on a bike, you'd need 3-5 tabs of nuun to replace your hourly losses as to where you'd need 5-10 capsules of Endurolytes to achieve the same results. He said the variable being the fact that some people sweat more than others as the reason for the + of the amount of each one.
One of the keys he mentioned is knowing how much you sweat/Hour as the caveat for how you'd approach fluid replenishment. The only way to know for sure is to weigh yourself pre/post ride a few times to get an avg of the amount that you sweat so you can ballpark the amount you'd need to put back in per hour of activity.
"The concentration needs to be right so you get a 1:1 relationship between the amount of sweat/sodium lost/hour and the rate at which you replace it."
He said this could include something as simple as a teaspoon of salt in each bottle you consume with water if you weren't using either product to essentially get the same effect.
My mother in law is a bio-chem professor, and she told me that something as simple as a longer exhale than the time you inhale can also help with cramping because it helps keep your pH levels in balance better due to you releasing more CO2.