Whether you feel a sore throat or cold coming on, or have been fighting one for weeks, try taking contrast showers to boost your immune system. Here’s what to do: shower hot for 3-5 minutes and then switch to 30 seconds cold. Then repeat 5-7 times. The heat will dilate all vessels, sending your immune fighters out closer to the surface. The cold water will then contract vessels and bring the fighters in. This acts as a natural pump causing lots of fighters to be circulated around the body quickly, thus increasing the chance of more specific fighters hitting the target areas. Always finish with cold, but never allow yourself to get a chill. Contrast showers also boost metabolism if you are looking to lose weight, can help clear the skin, and dump toxins.
Quick tip: cold water is less of a shock to the body if it hits your head first. Each cold repetition will become easier as you go along.