Imagine balancing a ruler vertically in the palm of your hand: you have to constantly pay attention to the angle of the ruler and make many small adjustments to make sure it doesn't fall over. It ...

When UC San Diego bioengineering professor emeritus Shu Chien reminds you that it's a good idea to get up, move, and get your blood flowing, he knows exactly what he is talking about. In fact, Chien ...