Thanks for all the replies regarding the muscle cramp/twitching issue. Posting here and reading the replies prompted me to think again about this issue. I decided to dowse (with a pendulum) to see which supplements I should be taking for this issue, with interesting results. I've always had good results when I've used dowsing for health issues.
The results were: stop taking calcium; reduce magnesium intake to 750mg daily in divided doses; increase potassium intake to 99mg four times daily; increase mag phos (tissue salt) to seven or more doses daily. I've noticed that the muscle twitches stop a few minutes after a dose of mag phos. The dowsing result for today is the same as yesterday. I'm going to continue checking this on a daily basis until the cramps are gone.
I slept really well last night with no muscle cramps and much reduced twitching.
Gertrudes said:
Another thing to consider is your protein intake. Are eating more then 0.8g of protein times your body weight?
If anything I'm eating a little below my ideal protein intake, but I am eating plenty of fats. I've been taking l-carnitine for few weeks now, but everything is pointing to excess calcium as the culprit . . .
Muscle cramps and twitching are a common symptom of calcium deficiency. A couple of sites that carry this information are:
_http://www.calciumdeficiency.co.uk/
_http://www.3fatchicks.com/4-signs-you-have-a-calcium-deficiency/
However, calcium is also a muscle constrictor and not a relaxant like magnesium.
This page has some information about calcium, including the following:
Too much calcium not only results in calcifications, but calcium overload can produce severe muscle spasms and cramping. Calcium is a muscle constrictor while magnesium is a muscle relaxant. Excessive calcium often produces symptoms of constipation, heart flutters (fibrillation), eyelid twitch, migraines, leg cramps, back aches and monthly cramping in females. � Bill Sardi
So calcium supplementation can actually cause muscle twitches and cramps even though they are also symptoms of calcium deficiency!! It sounds like it's best to avoid calcium supplements. Calcium supplementation also carries other risks including early mortality, vascular disease, etc.
It appears therefore that one of calcium's purposes in the body is to facilitate a slight constriction in the muscles. I have noticed from practicing Qi Gong that relaxed muscles are not flaccid muscles, they are slightly constricted which maintains the tonus of the muscle. So this means, OSIT, that the balance of calcium and magnesium is very important, and excess calcium is going to cause excess constriction. Anart was absolutely right to say that . . .
anart said:
Calcium does not relax muscles, so I'm not sure why you're linking calcium to a lessening of leg cramps. It could be that they're not going away because of the calcium.
Wikipedia said:
Muscle tone
In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles, or the muscle’s resistance to passive stretch during resting state.[1] It helps maintain posture, and it declines during REM sleep.
Purpose
Unconscious nerve impulses maintain the muscles in a partially contracted state. If a sudden pull or stretch occurs, the body responds by automatically increasing the muscle's tension, a reflex which helps guard against danger as well as helping to maintain balance.
The presence of near-continuous innervation makes it clear that tonus describes a "default" or "steady state" condition. There is, for the most part, no actual "rest state" insofar as activation is concerned.
In terms of skeletal muscle, both the extensor and flexor muscles, under normal innervation, maintain a constant tone while "at rest" that maintains a normal posture.
Cardiac muscle and smooth muscle, although not directly connected to the skeleton, also have tonus in the sense that although their contractions are not matched with those of antagonist muscles, the non-contractive state is characterized by (sometimes random) enervation.