Which of the following is a sign of overtraining?

Extreme soreness after workouts is indeed a sign of overtraining, as it indicates that the body is not recovering adequately from exercise stress. Overtraining occurs when there is an imbalance between training and recovery, leading to physical and psychological fatigue. When an individual experiences extreme soreness, known as delayed onset muscle soreness (DOMS), it may suggest that their muscles are being subjected to excessive stress without sufficient recovery time, which can hinder performance and lead to injury if not addressed.

In contrast, increased motivation, improved performance, and increased appetite typically suggest positive adaptations to training rather than negative ones. Increased motivation often reflects enthusiasm and drive, improved performance indicates strength or endurance gains, and increased appetite can be a sign that the body is responding well to new training stimuli, thereby requiring more fuel. These factors generally do not correlate with overtraining.