Any stimulant like tea or coffee, which has caffeine (in all varieties; with milk or without, with sugar or without, oolong, white, green, purple, blue) and cigarettes jolt the system out of slumber. It increases the blood pressure, heart rate, breathing rate and makes the body feel stressed or ‘kicked’. Sadly we mistake this for feeling awake. In reality, the body experiences stress because of the increase in its heart and breathing rate and will respond by hampering fat burning.