What are they?
Involuntary contractions of muscle groups (usually in the legs, neck or back) which make the area painful and tender. Some people get them in bed at night. A particularly unpleasant form occurs in some people in the muscles between the ribs when making certain movements-for example when turning round to look behind them when reversing the car.
What causes them?
Often the cause is unknown but several are recognized:
• Tired or stressed muscles, in swimmers or footballers, for example.
• Certain occupational cramps are well recognized. An example is writer’s cramp, which affects typists, musicians and type compositors, as well as writers.
• Very hot working conditions leading to profuse sweating. Many of those who work in blast furnaces or ships’ boiler rooms know all about this type of cramp. It is caused by a loss of sweat together with its salt, and the cramps are really the result of sodium shortage. In a similar way dehydration during serious illnesses involving a fever can cause cramps.
• Chronic alcoholism causes cramps in the legs and feet.
• An elusive but common form of cramp is the ‘stitch’ in the side-experienced, for example, by long-distance runners. It is thought to be caused by a cramp in the diaphragm muscle.
• A shortage of calcium.
• A lack of vitamin E.
• Uterine cramps occur in some women on the first couple of days of their period. These period pains are the biggest cause of lost work and school days in females. There are many ‘cures’ for these cramps, the best of which is a drug which prevents the release of prostaglandins in the uterus – now known to be the cause of the pains -but there is as yet no fully proven way of preventing period pains.
Prevention
• The prevention of sports-induced cramps is usually straightforward and involves doing proper warming-up exercises before embarking on any strenuous sporting activity. Avoiding chilling the muscles helps too, and some sportsmen and women find that binding up the area helps. As soon as you get any form of cramp it is best to stop what you are doing until the symptoms go. The best treatment for cramps is to put the muscles involved under tension (stretch them). Someone else will almost certainly have to do this for a cramped sportsman or woman.
• The prevention of occupational cramps is usually fairly obvious. Special attention should be paid to posture, seating, lighting, desk height, and so on.
• Those who work in very hot conditions should take salt tablets regularly.
Calcium is vital for adequate muscle function. Prevention Magazine in the US carried out a survey in 1977 of 3,000 readers to find out how calcium had improved their health. Over half wrote to say that it had relieved their muscle cramps. Probably the best way to increase calcium intake is to take Dolomite tablets before each meal and one at bedtime.
• Vitamin E also seems to play a part in cramps. When a team of Los Angeles doctors gave the vitamin to 125 patients with night-time leg and foot cramps, 103 had complete or near-complete relief. Some of these people had had their cramps for thirty years. Almost half the patients got better on 300IU units or less of vitamin E a day. The other half needed 400 IU or more, and many had to stay on the vitamin if they were to remain cramp-free. Vitamin E has also been used to treat a cramp-like condition in the legs known as intermittent claudication. In a study of forty-seven men with severe intermittent claudication, thirty-two were given vitamin E and the rest drugs to prevent and cure the cramps such men experience on walking. After three months the men were tested to see how far they could walk. In the vitamin group 54 per cent could walk the maximum distance set by the tester (just over 1/2 mile) but only 23 per cent of the drug group could do so. It appears that the vitamin E improved the circulation in the legs. After eighteen months of taking the vitamin twenty-nine of the thirty-two men showed an increase in the blood flow to their legs whereas most of the men in the drug group had a decreased blood flow.
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