On the Details page you can see maximum and average heart rate, cadence and speed.
It would be very useful to see the medians (at least for HR and cadence) too. Could this be added, maybe as a preference?
Talking about extending functionality; in the graps it is possible to have the average drawn as a line. This could be usefully extended in several ways;
1) plot the median
2) plot 1-minute or 5-minute moving average
3) indicate the HR zones (and speed/cadence zones?)
By the way... Using my edge to determine resting heart rate, I wonder why there is no min. HR readout. I can find it manually on the graph of course and I can see why it is not generally useful, but if you need an excuse to put it in I think I found one ;)