Not really (imo)
Not unless you're planning a few hours worth of exercise in hot conditions. In which case I doubt they'd be carrying a 'Lite' sports drink. Most people aren't exactly short of salts in their diet in the first place.
Not sure if salt in diet is relevant. Its salt etc lost during long runs/bikes etc from the body and the need to replace that as well as water during and immediately after those long runs to keep everything balanced. I normally have one of those nuun tablets or similar - which I guess is kind of a "lite" sports drink.
As I understand, current thinking has changed on salt availablity.
Sodium Balance and Performance
- Dogma: We need to supplement with sodium to complete long-distance endurance events.
- Science: The body self-regulates blood sodium concentration via several mechanisms, including sodium sparing in sweat and urine. When one “drinks to thirst,” blood sodium concentration invariably rises during prolonged exercise; it never falls.
One of the most persistent beliefs in ultrarunning is that we must ingest sodium for optimal performance, if not survival. Not so, claims Noakes. He points out several studies, including sodium deprivation studies involving prolonged exercise over several days, that demonstrates that the body will maintain blood sodium levels in a deprivation state.
In explaining this phenomenon, Noakes points out our biological mechanisms to preserve sodium in both sweat and urine – pointing out that these studies measured sodium concentrations next to nothing during prolonged exercise and sodium deprivation. Moreover, blood sodium concentrations stayed within normal ranges – so long as athletes and subjects drank only to thirst.
- Dogma: Heavy sodium concentrations in sweat – evidenced by salt-staining on skin and clothing – identifies a person as a “salty sweater”, and that these people need even more sodium supplementation.
- Science: The self-regulation of sodium concentration results in sodium excesses being secreted; salty secretions will cease when sodium balance is achieved.
Simply put, the presence of salt deposits on skin and clothing are due to the body ridding of excesses, and when sodium balance is achieved – or if a blood sodium deficit is perceived – the body will conserve it from sweat and urine.
- Dogma: Sodium supplementation stops and prevents Exercise-Associated Muscle Cramping (EAMC)
- Science: There is no scientific evidence that shows sodium (or other electrolyte) deficits in those with muscle cramping.
This is another interesting dogma that has thrived, pre-dating even Gatorade. The original belief of salt deficits and cramps was based, according to Noakes’ review of research, on studies of a single miner in the 1920s, who showed salt and fluid losses in association with cramps.
http://www.irunfar.com/2012/07/waterlogged-a-dogma-shattering-book.html
Edited: 20/07/2012 at 13:39