Student reading proficiency lags grade-level expectations in the majority of the United States. Much research has demonstrated the moderating impact of student motivation on reading scores. The purpose of this action research was to study the effects of physical activity on reading motivation and reading comprehension, with a special focus on readers at risk for reading deficiencies as identified by FAST testing. The research was carried out on eighteen third grade students in rural Iowa, seven of whom were at risk for reading deficiency. The use of physical activity had a positive effect on both reading motivation and reading comprehension, with a larger reading comprehension impact for at-risk students. These findings suggest that teachers should use physical activity to motivate struggling readers.