When exercising vigorously or for prolonged periods of time, blood-glucose testing should occur?

Exercising vigorously in prolong periods of time could cause level of blood glucose to decrease. In order to have your blood glucose tested, it is best to rest for hours, to normalize the blood glucose level, so that there is no interference with the results. It is also best to have your blood glucose to be taken before undergoing to a vigorous exercise so that there will be no interference with the results.