What that means is this: if you use a KNOWN HR max as your starting point, you'll be more accurate than if you use an age - predicted HR max number. (runningstrong.com)
But with and early morning maxing number of surfers at 30 in the small line up. (baliwaves.com)
[Response: That 2 m max number is actually Tad Pfeffer's estimate for * EVERYTHING * including Antarctica and Greenland in the next 100 years. (realclimate.org)