MINIATURE LABORATORY: A new skin patch could help you keep tabs on your health while you work up a sweat - literally.
ASK AN EXPERT: Cells are the fundamental units that make up our body, so what happens to them when we grow? That depends upon the type of cell.
MEMORY JOG: Struggling to remember where you left your keys? A run might jog your memory.
GREAT MOMENTS IN SCIENCE: It seems that exercise can reduce the risk of congenital heart disease - if you are a mouse - says Dr Karl.