Some studies have shown that 90% of the population has some form of structural LLD. However, the majority of LLD cases are thought to be of little clinical significance except in overuse conditions. Symptoms are more severe on the LONG side in approximately 80% of cases due to increased stance time and excess pronation.
However, the majority of LLD cases were thought to be of little clinical significance and often asymptomatic except in instances of increased stress such as running. During gait movement, the longer leg experiences increased loading, often resulting in symptoms appearing first or being more severe in the longer leg. The body naturally compensates and tries to keep the head level at all times. This compensation can often lead to pain and tension in the lower limb.