Chronic Fatigue Syndrome Test 2025 – 400 Free Practice Questions to Pass the Exam

In patients with Chronic Fatigue Syndrome (CFS), exercise intolerance is most commonly characterized by increased fatigue and symptom flare after physical activity. This means that individuals often experience a significant worsening of their fatigue and various other symptoms not just immediately after, but also in the days following any physical exertion. This phenomenon is sometimes referred to as post-exertional malaise, which is a hallmark symptom of CFS.

Patients may begin an activity feeling capable, but afterward, they can suffer from amplified fatigue, cognitive difficulties, muscle pain, and other health issues that are more intense than before the activity. This response distinguishes exercise intolerance in CFS from typical fatigue, as it reflects a profound dysregulation in how the body's systems respond to physical stress.

The other answer choices do not fully capture the essence of exercise intolerance in CFS. While decreased energy levels throughout the day may be an experience for many patients, it does not specifically speak to the reaction to physical activity. Immediate fatigue after physical activity could occur in many people without CFS and doesn't represent the unique symptom flare characteristic of the condition. Lastly, prolonged recovery time without symptoms is not applicable because, in CFS, any recovery will likely involve significant symptoms. These elements help contextualize why