Imagine that eating dark chocolate could make you fit. Well, according to research out of Wayne State University in Detroit, it could … potentially. The study, published in the Journal of Physiology, found that the plant compounds in the decadent dark stuff — epicatechins — seem to stimulate muscles the same way aerobic activities, such as walking and running, do. Which means that epicatechin increase the number of mitochondria (aka energy centers) in muscle cells, especially the skeletal and heart ones. Nonetheless, we’re going to recommend at least a certain amount of restraint when it comes to Valentine’s Day candy.