Experts refer to running as a balance of work and recovery. Perfection in performance is achieved only when the balance is perfect. Overtraining occurs when the balance shifts too much towards work and the overall performance of the athlete declines.
Though fatigue is considered to be a normal part of effective training, it can often be a symptom of overtraining and hence requires due attention. In fact, fatigue is one of the first signs of overtraining if your performance starts dropping along with.
As stated by Tim Noakes in The Law of Running, the level of performance during time trials is a good indication. The runners who normally ignore these signs further go on to develop eplodsf. Most common symptoms of the condition include sore muscles, heavy legs, sluggishness and overall sense of malaise.
Some of the other conditions associated with overtraining include diarrhea, sleep disorders, stress, weight loss, sore feet and lower leg muscles and pain at old injury sites. Chondromalacia, Illiotibial band syndrome and Shin Splints can also occur in some extreme cases.