Scientists warned that the athletes may be exposed to a bug in a heartbeat because of endurance training may need for a device to regulate the heartbeat. A team of researchers at the Heart Foundation in Britain, after subjecting rats to training, to the molecular changes occur in part responsible for the generation of heart naturally. The study, published in the journal "Nature Kmonakishnz" scientific, that this finding may explain the decline in heart rate in prominent athletes in rest mode, and made them more vulnerable to the risk of disorder in a heartbeat. Yet scientists say that the benefit of exercise training is still outweighing any risks in value.

Fitness high

Players enjoy physically fit athletes generally high. But the irony is that they are at greater imbalance in the cardiac arrhythmia known scientifically as "arrhythmias" or heart rhythm disorder, especially when they grow older, though, so the risk remains limited. Scientists believe that this is due to the long periods of training performed by athletes in preparation for the big tournaments, such as marathons and "Altreattlon", leading to a slow heartbeat.

How do you rehearse?

- Adults should exercise a moderate amount of aerobic exercise for 150 minutes per week.

- I do not need to achieve this goal through a single session or two long, but you can distribute to many times short throughout the week.

- It is important to take a break during exercises Aerobics strong performance, such as running.Modifies the condition of the body is between exercises. Also, excessive exercise may weaken even the strongest athletes.

- Make sure you are in the process of heating up before the start of the process of calming exercises and then by doing some light Anbsatat and movements to avoid injuries.

And while the heart rate at rest in adults between 60 and 100 beats a minute, this rate may be reduced when athletes to 30 beats a minute or even less than the rate of strikes at night time, when there are long pauses between heartbeats. It is said that the heart rate when riders Sir Chris Hoy and Miguel Andoraan at rest ranged between 28 and 30 beats a minute. And determine the heartbeat by entrepreneur and strike, which is controlled by the nervous system of humans. Therefore it is supposed to be the heart rate low among athletes is a result of increasing the speed of the autonomic nervous system.

Protein is important

But Professor Mark Poyet and his colleagues at the University of Manchester in their studies to point out that this is not the case. The research team believes that the pacemaker "natural" changes in response to exercise. By studying mice, the team found that endurance training leads to reduce a protein important for regulating heart rhythm known as HCN4, and this in turn leads to reduced heart rate. Says Professor Poyet: "This is important, because despite the fact that the low rate of heart at rest when athletes do not cause problems in general, it is likely to require athletes elderly who have spent long periods in training throughout their lives to organized industrial pacemaker" .But he added: "Although excessive exercise may have adverse effects on the heart, but the benefits far outweigh these effects."Says Professor Jeremy Pearson, Associate Medical Director at the British Heart Foundation said: "The study shows that the electric grid of the heart has changed in mice trained for a long time, and that these changes in the heart have been found as yet."He added: "If applicable, the results of the study on humans may have signs of heart health in older athletes, but we still need to conduct more studies before they announce the verdict."

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