It may come as a surprise that there is such a strong connection, but if you get to know the physiology of the stress response, it makes sense. When you are stressed, your body activates the physiological reaction "fight or flight". Part of this response is for your body to release blood sugar into your bloodstream so you can use it right away in an emergency. For example, if you run away from a dangerous situation, you need the fast energy provided by glucose in the blood. However, a problem occurs when you are always stressed. When this happens, you get a constant blood sugar release, which also releases more insulin.
This high insulin state, called hyperinsulinemia, essentially results in the body trying to force glucose back into the cells. Insulin is also one of the hormones that signal your body to store fat. This explains why people often gain weight during a stressful time in their lives ̵
If You Look While this happens, you see that the brain is experiencing stress or anxiety, releasing cortisol from the adrenal glands. Then you would see a message from the brain into the body to release blood sugar and increase liver gluconeogenesis – a process that regenerates glucose. As soon as the stressful event is over, the signal stops.
This is fine if it is rare, but for most of us this happens several times a week, daily or even hourly! Your body can be really confused and floating in the blood stream with a lot of unnecessary glucose that the muscles and body do not really need.