Overload

Slugged through a 14 miler this morning to mark my second consecutive 40 mile week. I can tell I've pushed the limits by how sluggish I'm feeling. That is all part of the building process.
The over-load principle.
Done correctly, it is a break 'em down,build 'em up approach that flirts with over-training. There is a fine line that you've got to dance very close to, however if you step over the line, it can spell disaster. As the saying goes..'what doesn't kill you makes you stronger.