DO YOU...do cold? If not, do you know what you are missing? Relax, we aren't telling you that you need to forget or forgo warm water. We are simply saying, 10-15 seconds of cold water, at the end of your shower, in the morning, has some tremendous benefits that we are certain you will want to take advantage of. And, just so you know, this one little tip can, and most likely will, have a huge impact on the start to your day and your productivity. You've been warned! #coldshowers #fitness…