Bad physiology reinforces negative feelings. As Tony says, “Motion creates emotion.” Changing your physiology means changing your mental state and breaking your negative patterns. Great physiology therefore leads to great emotions, and that is one of the keys to getting unstuck. Foster a positive mental state and get unstuck by changing your physiology!

I just copy pasted this from Tony Robbins website, he is really a good motivational speaker. A 15 minute jogging would really help you change your mood.