"#2 mistake: Too many hard days. Not enough easy days.
Correction: To go hard you must rest before.
Comments: I’ve found that athletes don’t like to rest. I can give them the hardest possible workout and they will excitedly salivate in anticipation. But schedule an easy day or, heaven forbid, a day off and I’ll have to justify it. All too many make their easy days moderately hard which means they come into the next scheduled hard workout just the slightest bit tired and so it also becomes moderately hard. All training migrates to the middle of the sliding intensity scale. This is the road to poor performance. The closer you get to the race the easier the easy days must be so that the hard days can be truly hard."