What those Z notations mean

Absolutely nothing this morning. I've been so smoked from driving over 80 miles round trip per day for Jumpmaster refresher (not to mention the additional note of almost seeing my helmet burn in from 1000 feet after pulling the most rushed jumpmaster duty of my entire life) that I felt unindustrious.

But I digress. If you are curious as to what I refer to in terms of Z1 through Z5, go to this URL:
http://www.peakscoachinggroup.com/tips/zones.html

Tomorrow the plan is for over 7. After eating at the chow hall this week, it's some to burn some blubber.