Are you suffering from a constant cough or cold? Or generally feeling tired and lethargic?

Did you know that exercise not only makes you fitter and stronger, it also helps your immune system fight off bacteria and viral infections. So getting your butt to the gym may be way down the list of priorities at this time of year, but surely your own health & wellbeing should be top of the priority list. After all, what use are you to others if you're sick?

Physical activity gets your body working at a faster rate than normal day to day activities do, sending antibodies and white blood cells through the body at a quicker rate. As these antibodies and white blood cells circulate faster, they can then detect bugs sooner than they would. The increased rate of circulating blood also triggers the release of hormones that "warn" immune cells of bacteria or viruses.

Exercise and an increased respiratory rate also helps to clear out our lungs and to flush out airborne bugs, like flu and colds by increasing the output of waste, such as sweat and urine.

The temporary rise in body temperature may also prevent bacterial growth, allowing the body to fight off infection more effectively. (This is similar to what happens when your body has a fever.)

Exercise slows down the release of stress-related hormones. Stress increases the chance of illness.

However, if you already have flu symptoms or feel unwell, be careful not to "overdo" it. Speak to a professional before you begin exercise if you are unsure.

Exercise can help us feel better about ourselves, just by making us feel more energetic and healthier. The change in temperature may trigger aches and pains too, so improving muscle strength and posture will help combat this. So get to the gym, go to a class and feel good this winter.