Don't think we're mean, we mean well! Originally, the idea of blasting cold water mid warm shower seemed a cruel and unusual punishment, as being cold most of the time means showering offers a soothing reprieve. This tip was first recommended to Angela by her naturopath in an effort to improve circulation, and because she's tough and has some serious stamina, she's done it (nearly) every day since. It's easy to do as no new products are needed. The hurdle is simply to willingly turn the tap in the opposite direction of heat. We figure, if we, hailing from the icy cold of Newfoundland, with no heat in our bones can do it, you can do it too!
This is how to take a hot/cold shower: Do it at a 3:1 ratio: A minute of hot followed by 20 seconds of cold 3 to 4 times. Keep in mind, you don’t need to be a hero. The first cold blast doesn’t have to be FREEZING. As you go, get a little hotter and a little colder. Within reason. Don’t burn yourself or induce hypothermia. The 'hot' temperature should still be comfortable, and the cold kind of like first swimming in the ocean; you'll want to jump out but you'll be fine if you stick it out. Aim to to end on cold, which will be much easier in the summer months, and in the winter it's ok to end on hot for the obvious reason of keeping warm. The idea is that alternating the temperature improves circulation: The cold directs circulation inward toward the organs, and the hot brings it back toward the skin.
Alternatively, you could live in my apartment building, where there is no need to do it yourself, you'll just find halfway through washing your hair that someone on the floor above has flushed the toilet and voila! – a cold blast of water of unknown length! But, the ideal is to be in control of the water temperature and do it without freezing your buns off.