Which of the following is a sign of overtraining in clients?

Decreased performance is indeed a sign of overtraining in clients. When an individual is overtrained, their body experiences physical and mental fatigue that can lead to a decline in performance levels. This can manifest as reduced strength, endurance, or overall training effectiveness, making it harder for the client to complete workouts or achieve their fitness goals.

In contrast, signs such as increased motivation, improved recovery times, and enhanced mood typically indicate that a client is responding well to their training regimen. An increase in motivation usually occurs when one is feeling good about their progress, while improved recovery times suggest that the body is adapting effectively to the training. Enhanced mood can reflect a positive response to exercise, which often helps motivate individuals to maintain or increase their training intensity. Therefore, decreased performance serves as a critical indicator that something is amiss, likely due to overtraining.