ISSA Trainer Practice Exam 2026 – Complete Study Resource

Decreased performance and chronic fatigue are hallmark symptoms of overtraining. When an athlete or individual engages in excessive training without adequate rest and recovery, the body can enter a state of physiological stress. This stress hampers the body's ability to recover and adapt, leading to a decline in performance levels. Individuals may experience persistent fatigue that does not improve with normal recovery protocols. This state can also result in mood disturbances and a general sense of burnout, further impacting performance.

In contrast, the other options indicate signs of positive adaptation or improvements in physical condition, which are not characteristic of overtraining. For instance, increased strength and energy, frequent injuries with improved recovery, or gains in muscle size and performance all suggest effective training and recovery protocols rather than the detrimental effects caused by overtraining. Recognizing the symptoms and effects of overtraining is crucial for trainers to ensure that their programs include appropriate recovery measures to foster optimal performance and health.