Your body has a fabulous mechanism to control its own temperature. If your body is too cold, it will warm itself by shivering. If your body is too hot the body will send extra blood flow to the skin (carrying the excess heat from the core of the body) which will cause sweating. This in turn will allow cooling of the body via the process of evaporation.
Note: This is why you often sweat more immediately after exercise as the heart is then free to send extra blood flow to the skin to remove heat from the body as the working muscles (from the exercise or activity you have been doing) no longer need the increased level of oxygen from the blood flow to those muscles.
In providing this cooling or warming effect, the body will naturally burn extra energy. Because we however, spend so much time in climate controlled environments, we rarely get the fat reducing benefit of either situation. Even when we exercise, we often expect the air-conditioning to be ‘turned up to the max’ so that we are not too uncomfortable!
To gain the benefits of the natural temperature control of your body, try spending as much time as possible outside. When you are in a climate controlled environment such as your car or office, turn the heat down as low as you can in the cold weather and up as high as you can in the hot weather (within reason of course – I am not suggesting that you create a sauna in your office). Better still, don’t use artificial heating or cooling whenever possible. Not only will this help you lose weight, it is great for the environment.
If this small measure only accounts for an extra 88 kilojoules (21 calories) of energy expended each day, that is still 1 kilogram (2.2 pounds) per year. It all adds up!