For blood glucose there was little difference between groups at any time point .
Objective Type 1 diabetes mellitus rates are rising worldwide .
The health benefits of physical exercise in this condition are many , but more than 60 % do not participate , mainly from fear of hypoglycemia .
This systematic review explores the effects of physical exercise modes on blood glucose levels in adults for hypoglycemia prevention .
Carbohydrate requirement and insulin concentration during moderate exercise in type 1 diabetic patients.
The lack in control of insulin release combined with an inadequate carbohydrate ( CHO ) ingestion accounts for the occurrence of frequent metabolic unbalances during exercise in type 1 diabetic patients . The aim of the study was to quantify , in these patients , the CHO requirement to prevent hypoglycemia during moderate exercise performed at different time intervals after morning subcutaneous insulin injection . Twelve type 1 diabetic patients and 12 well-matched healthy subjects  cycled 4 times for 1 hour at a constant workload . The rate of glucose oxidation was calculated continuously by indirect calorimetry throughout the exercise , while blood parameters were assessed periodically and orally given CHO were checked . CHO needed by the patients to prevent hypoglycemia decreased as the time elapsed from insulin administration increased , amounting to 0.63 + /- 0.30 , 0.44 + /- 0.32 , 0.28 + /- 0.24 , and 0.14 + /- 0.18 g/kg after 1 , 2.5 , 4 , and 5.5 hours , respectively . Total glucose requirement during moderate exercise ( sum of alimentary and extracellular source ) was correlated ( r = 0.739 , P < .001 ) to plasma insulin concentration , but not with fitness level . Time elapsed from last insulin dose is not a factor influencing the risk of hypoglycemia during exercise when a proportional , appropriate amount of CHO is ingested
For blood glucose there was little difference between groups at any time point .
Objective Type 1 diabetes mellitus rates are rising worldwide .
The health benefits of physical exercise in this condition are many , but more than 60 % do not participate , mainly from fear of hypoglycemia .
This systematic review explores the effects of physical exercise modes on blood glucose levels in adults for hypoglycemia prevention .