It's a cold one today, but is it too cold for playing out? Some studies suggest that winter can help wake up our mind and help us think more clearly. The brain's main energy source is glucose and when it is depleted the brain function can be jeopardised. However, energy, i.e., glucose, is also used for the regulation of body temperature, especially in extremely hot or cold conditions. More energy (glucose) is needed to cool down than to warm up the body. Therefore, warm tempe