The effect of three test meals on exercise tolerance of an individual with McArdle's disease.

This study examined the effect of three test meals on exercise tolerance of an individual with McArdle's disease, a myopathy characterized by phosphorylase b deficiency. The subject's exercise tolerance and ability to achieve the second wind, in response to each test meal, was evaluated over a 16-week period using a bicycle ergometer in a double-blind situation. Data were analyzed using one-way analysis of variance. No significant differences were found. It was concluded that a high protein meal, a high polyunsaturated fat meal, and a meal containing MCT oil did not affect the exercise tolerance of this individual compared to the control meal.