I think the "<i>changes our DNA</i>" is far fetched, but the link between exercise and the neurochemistry in the brain has been proved by multiple studies.<p>I've mentioned here before, but John J. Ratey recently wrote the excellent <i>Spark: The Revolutionary New Science of Exercise and the Brain</i>[1], where he explains in colorful details what happens in (and to) the brain when you exercise.<p>[1] <a href="http://www.amazon.com/Spark-Revolutionary-Science-Exercise-Brain/dp/0316113514" rel="nofollow">http://www.amazon.com/Spark-Revolutionary-Science-Exercise-B...</a>
This is interesting research, for sure, but the headline's claim that it "changes our DNA" is misleading. The genes are not changed, only markers that have unknown effects on their expression. Learning more about the mechanisms of how DNA interacts with our body is certainly exciting, but the implication of the headline is that our actual genetic code is being tweaked, which is not true at all.
it is very interesting. I do not understand why people do not believe changing dna can be possible<p><a href="http://www.telegraph.co.uk/news/science/science-news/10486479/Phobias-may-be-memories-passed-down-in-genes-from-ancestors.html" rel="nofollow">http://www.telegraph.co.uk/news/science/science-news/1048647...</a>