Jogging is a good way to improve overall health, it’s also a great way to help you lose unwanted weight, however, according to a study their might be a chance that too much running might be a bad thing.


THE STUDY

Study researchers Jacob Marrot and his colleagues followed 1100 healthy joggers and 413 sedentary individuals for more than 12 years out of a pool of 5000 healthy Danish adults. The joggers logged their frequency and hours as well as their perception of their pace. The investigators found that strenuous joggers were more likely to die during the period than sedentary non-joggers and moderate joggers overall fared a lot better according to Marrot. The joggers had to report their own pace, which means it was based on the subjects’ own perception. According to Marrot this is more appropriate than an absolute scale especially with their age range differing from 20-95.


FINDINGS

It is believed that long-term strenuous endurance may end up inducing pathological structural remodelling of your large arteries and heart according to Marrot, however, according to another researcher based in the U.S. the debate around optimal running dosages for longevity is far from resolved. Duck-chul Lee who is an assistant professor of kinesiology at lowa State University said that this new study has got limitations and in Lee’s own study that consisted of 55 000 adults, he managed to find that there is a lower risk of death for runners with a very high run frequency and running time. This study was published in 2014 in the American Journal of Cardiology.



One limitation of Marrots’ study is that a very small group ended up logging the most jogging time, approx. 47 joggers did more than four hours a week, and only 80 ran more than 3 times per week. According to Lee, these small numbers could have an effect on the comparison results.

We also need to keep in mind that the researchers only looked at 3 500 non-active joggers who were used to exercise in other ways and instead of looking to see whether high jogging miles and jogging times affected causes of death, the researchers only looked at the death from all causes, and this didn’t give much specifics regarding the potential harms.


CONCLUSION

Running (for now) might only be bad if you have an already existing cardiovascular disease, and according to Lee’s study death from all causes was lower in runners compared to non-runners no matter how much they ran. The good news is that the study concluded that it is beneficial to run as little as an hour a week or even once a week compared to not running at all. Yes, Marrot’s study found an association between moderately active runners and improved survival rates, however, it did not prove a cause and effect relationship.




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