700+ minutes per week. About half of that is road cycling (brisk to fast pace); the rest made of of hiking, climbing and swimming. So all would count as either moderate or high intensity physical activity.
The World Health Organisation (who know a thing or two about these things ... although obviously not as much as the STW experts ) published their revised recommendations for adults last year:
150 minutes of moderate+ intensity activity per week (preferably upping to 300 minutes); or 75+ minutes of high intensity
If you're not sure whether your activity counts as moderate or high intensity, you can always check in the Compendium of Physical Activities: http://sites.google.com/site/compendiumofphysicalactivities/
But basically, if you've increased youre breathing rate it counts as 'moderate', if you're panting and sweating it counts as 'high' intensity.
And if you wait a few weeks, I'll be publishing our research on the the data about the amount of physical activity people get from outdoor recreation (and yes that does include mountain biking!) Bet you can't wait for that exciting installment