The scientific publisher Springer has launched a free analytics tool that gives you a peek into how people are using the publisher's online content. The tool provides a number of visualizations based on real-time data aggregated from Springer's online offerings.
Springer's publications include nearly 5 million documents from about 41,000 e-books, 1160 book series, and 2524 academic journals. For this reason, the tool can be considered a useful and interesting way to look at what scientists are reading.
Here is a link to the European Journal of Applied Physiology’s stats.