Because of the muscle activation, other hormones such as dopamine and serotonin are released. Dopamine is considered as a preliminary stage of adrenaline and is therefore a natural motivator. Serotonin, on the other hand, ensures that our psyche is stabilized and that we feel more calm and harmonious.
It is scientifically proven that you are more productive and concentrated if you start your day with a workout!
So what are you waiting for?