Robert Bannister auf Tue, 21 Jun 2016 08:43:19 +0800 geschrieben ...
> I was intrigued by the Wiki article suggesting potassium supplements as
> a possible cure. Everyone else seems to suggest magnesium, which I take
> and which does seem to help.
I wish I had a better description for what you just stated than to say you
subscribe to an "urban myth".
I don't fault you for being completely unscientific because I too would
"assume" or "guess" that either hydration or electrolyte imbalance would
be a contributing condition to a charley horse.
It just seems "logical" to a rational person, just as it seems logical
that their brake rotors "warped" or that they got a cold from being outside
in bad weather, or that higher octane gasoline is (somehow) inherently
"better" than lower octane fuel or that you can be "immune" to poison
oak, or that the earth revolves around the sun, or that gravity is a
force, or that the centrifugal force is a "real" force, or that dna
is the "blueprint" for life, etc.
All these are "things" that I have no better term for other than
"urban myth", but it's really not "urban" and it's not so much a
myth as an abomination of logical thought gone astray solely due
to complete lack of any scientific rigor on the part of billions
of people who just don't think things through scientifically.
I don't mean that as an insult; I simply mean that as an observation
that out of the billions of people on earth, probably a few million
have the capability to logically think things through by seeking
"true" scientific evidence to back up their thought processes.
Most of the billions of people on earth, frustratingly, will just
outright state that electrolyte imbalance or dehydration is both
the cause and cure - which is so frustrating to a logical thinker
such as I am - that I wish there was a term for this that is better
than the word "urban myth", which is the best that I can come up
with but which doesn't adequately display the error in thought.
Here's a paper which very clearly states (verbatim):
"Neither exercise-related cramps nor nocturnal cramps have been
associated with hypovolemia (caused by dehydration) or disturbances
of electrolytes such as potassium, sodium, and magnesium.7,8
One study of patients with nonalcoholic cirrhosis demonstrated that
leg cramps are not related to changes in the levels of creatinine,
calcium, magnesium, sodium, potassium, zinc, glucose, alanine
transaminase, total bilirubin, or albumin.10"
PS: Does the double quote go outside the reference number, or inside?
While those scientists "could" be wrong, I suspect we should read the
references first, where reference 7 & 8 & 10 are respectively:
7. Schwellnus MP, Nicol J, Laubscher R, Noakes TD. Serum electrolyte concentrations and hydration status are not associated with exercise associated muscle cramping (EAMC) in distance runners. Br J Sports Med. 2004;38(4):488–492.
8. Sulzer NU, Schwellnus MP, Noakes TD. Serum electrolytes in Ironman triathletes with exercise-associated muscle cramping. Med Sci Sports Exerc. 2005;37(7):1081–1085.
10. Baskol M, Ozbakir O, Coskun R, Baskol G, Saraymen R, Yucesoy M. The role of serum zinc and other factors on the prevalence of muscle cramps in non-alcoholic cirrhotic patients. J Clin Gastroenterol. 2004;38(6):524–529.
PS: Do any of you in EDU world have access to those three reference papers?