So its now 12 full weeks since I started this thread and, coincidentally, my Garmin app charts my VO2 max over a 12 week period. Yeah I know VO2 max as measured by an app isn't going to be blindingly accurate, even though nowadays I wear my HR chest strap all of the time when exercising, but as a way of measuring relative fitness its really good I'd say. Especially good in fact as I'm now according to Garmin in the top 10% for my age and have a fitness age of 33 :cool:
https://live.staticflickr.com/65535/...501e0347_k.jpg