Rest periods are important in training.

When building up condition, such as with young horses, putting an amount of stress on the body will encourage it to strengthen.  Overloading however causes the body to fatigue and it is during fatigue that the most damage occurs.

Tip 2 – Err on the side of conservative training and give adequate resting time (minimum 3-4 days) between stressful exercise sessions allowing the tissues to recover.