When you now look at the Navigator you’ll see that the colour scheme on the Relative CSS tab (where you normally first land) has changed: the bars other than the one representing you are pink rather than blue. This reflects a change in the default methodology to include all activities and not just those for which heart rate information is available. In the absence of data from a heart rate monitor, Crickles estimates cardiac stress from a power meter if one has been used (this is a good estimate), and in the absence of both heart rate and power data Crickles falls back on an estimate based on observed averages (this a poorer estimate, but better than ignoring those activities altogether).
If you want to go back to the old style, giving you analysis based only on activities with heart rate data, just tick the new Require heart rate data? checkbox in the side panel. This will revert to the previous methodology and the bars depicting other athletes will once again be blue.
If you use a heart rate strap less than the general Crickles population, the new (pink) methodology will tend to move you further to the right of the distribution. Conversely, if you use a heart rate monitor most of the time you’ll tend to move to the left as the activities of non-monitor wearers are added in.
You can see the numerical impact of the change by looking at your change in Cardiac Stress value on the y-axis.
This does not affect any tabs other than Relative CSS.