Chasing Mercury: Training to Combat Fatigue in Distance Runners reviews the concept of fatigue-the inability to maintain or repeat a given level of force production, a condition which results in an acute impairment of performance. The DVD details the factors that can cause fatigue in distance runners and explains how to train to combat each of those factors. One of four presentations from the VO2max Distance Running Clinic, the DVD is appropriate for distance runners of all competitive levels.