Exercise is good for the body.
Reading Body endorphins not only provide a feeling of elation in athletes, but also have a positive effect on the heart. The report scientists around Eric Dickson from the University of Iowa. Sport thus has a positive effect not only on the movement and training of the cardiovascular system, but also on the messenger substances it generates. In their study, the researchers compared rats that moved a lot over the day with rats that were kept almost motionless. The scientists specifically triggered a heart attack in the animals, which resulted in the agile rats to significantly lower heart damage. However, when the researchers blocked the receptors in the animals to which the endorphins dock, the cardio-protective effect of the training remained. The body's own endorphins are thus responsible for part of the positive effects of the sport on the heart, the scientists suspect. They also showed that exercise in the cells of the heart muscle alters the activity of genes involved in inflammatory processes and cell death.

The results could provide further explanations for the long-known fact that exercise is good for the heart. For example, studies have shown that regular intensive exercise reduces heart attack risk and increases the likelihood of survival after a heart attack, even in people with cardiovascular disease. In addition, regular exercise reduces the risk of atherosclerosis, osteoporosis, strokes and depression. A better understanding of how exercise protects the heart could help harness this effect for people with reduced mobility, the researchers hope.

Eric Dickson (University of Iowa) et al .: AJP? Heart and Circulatory Physiology, DOI: 10.1152 / ajpheart.00280.2007 ddp / science.de? Gesa graters

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