There was a time when things such as depression were dismissed as just a weakness of the mind or a way of people trying to get away with being lazy and moody. These days we know that depression is a serious medical condition which can affect anyone and can destroy lives without the correct treatment. This also is true for people who suffer from SAD and need SAD light therapy.

Seasonal Affective Disorder (SAD) is a type of depression that typically occurs each year during fall and winter...

I was recently in a hospital with a friend and as we walked along the ward I noticed a few patients had a probe attached to their fingers. Being curious I asked about these and was told that they were there to monitor oxygen saturation which refers to the fraction of haemoglobin that is saturated by oxygen. It is related to the partial pressure of oxygen in the inspired air and, therefore, to altitude. Normal oxygen saturation in an otherwise healthy individual at sea level is > 95%.

An...

It is a universal truth that a trim and toned physique is a desirable quality but it is also true that such a quality takes hard work and discipline. For the majority of people in the developed world the sad fact is that we often tend to let our bodies become overweight and unhealthy. Apart from our weight we also need to keep an eye on our body fat measurement using a body fat monitor and comparing to a body fat scale.

One method uses callipers to measure skinfold thickness at several ar...