The spinal cord begins as an extension of the brain. It is surrounded by the bony vertebral column, which acts as a protective mechanism. Any information (sensory or motor) that the brain needs to relay to the body travels via the spinal cord. Fortunately, the spinal cord is protected by vertebrae, so spinal-cord injuries are not common, and most ...
Approximately 8 million Americans currently practice some form of martial art. Given the rising popularity of martial arts, sports medicine researchers decided to compare injury rates among practitioners of various styles. Tae kwon do participants experience a higher rate of inju...
Cholesterol Peaks in Winter
People may benefit from having their cholesterol screened during both the summer and winter months. According to a study in the April issue of the Archives of Internal Medicine (2004; 164 , 863–70), cholesterol levels fluctuate over the course of the year and are highest during the winter months.
Frail older adults who practiced tai chi reduced their risk of falling,
according to a study conducted at Emory University Medical School
Researchers noted that adults in their 70s, 80s and 90s—some of whom could not walk without assistance—who participated in weekly tai chi for 48 weeks had fewer falls than subjects who participated in wellness education, according to results published in the Journal of the American Geriatrics Society (2003; 51 , 1804–5).
The foot is divided into three regions: rearfoot, midfoot and forefoot. The top of the foot is referred to as the dorsum or dorsal surface; the sole of the foot is referred to as the plantar surface. There is a fair amount of overlap among the regions, with some structures originating proximal and traversing distal. As a result, injury to a proximal (close) structure may result in distal (distant) symptoms.
One of the most common mistakes exercisers make during strength training is
to use momentum. For everyday movements, the use of momentum is normal and adaptive. It is the body’s way of conserving energy, particularly during running, throwing or pushing activities. But during strength training, momentum is counterproductive because it decreases the work a muscle does, thereby decreasing the effectiveness of the exercise. What’s worse, it is dangerous to the joints and spinal cord, since it overloads these areas, causing unnecessary “wear and tear.”
Thacker, S.B., et al. 2004. The impact of stretching on sports injury risk: A systematic review of the literature. Medicine & Science in Sports & Exercise, 36 (3): 371–8.
Purpose. Researchers at the National Center for Injury Prevention and Control and the National Center for Chronic Disease Prevention and Health Promotion systematically reviewed the research literature in order to assess whether stretching effectively prevents sports injuries and to make recommendations for research and prevention.
As a personal trainer, you probably know that exercise has been shown to increase bone strength, as measured by bone mineral density (BMD), in people of all ages. But did you know that the degree to which exercise improves BMD depends on a variety of factors, including age, reproductive hormone status, nutritional status and the nature of the exercise?