Physical exercise has many health benefits: it reduces stress, as it causes the body to produce endorphins, which allows people to sleep better (1). In turn, sleeping better allows the brain to focus better on tasks it needs to perform. It prevents people from becoming overweight or obese, since it burns calories, and by preventing obesity, it in turn prevents heart diseases and diabetes (2).
Many studies have shown that exercise changes how our genes operate (3). The structure of genes cannot be changed, however their behavior can be altered by methylation. This is when genes are more able or less able to obtain and respond to messages from the body because methyl groups latch onto the