Some minor defects cause only "exercise intolerance", with no serious illness or disability.

General symptoms are not limited to the eyes and can include exercise intolerance, muscle weakness, hearing deficit, and more.

Symptoms include exercise intolerance with myalgia, early fatigue, painful cramps, weakness of exercising muscles and myoglobinuria.

Mutations in cytochrome b primarily result in exercise intolerance in human patients; though more rare, severe multi-system pathologies have also been reported.

Mutations in Complex III-related genes typically manifest as exercise intolerance.

An association with exercise intolerance has been reported.

Tarui disease typically manifests itself in childhood with exercise intolerance and anaemia.

Symptoms include exercise intolerance, exertional syncope (fainting from physical exertion) and sudden death.

This contributes to the exercise intolerance commonly seen in heart failure.

This reduces the signs associated with inadequate ventilation (such as exercise intolerance or overheating) but may exacerbate the risk of aspiration and consequent pneumonia.