The Cycle Study: a Study of the Effectiveness of Cycling Exercise in Breaking the Cycle of Pregnancy Diabetes

"Each participant randomised to the exercise group will be required to participate in three 60-minute exercise sessions each week, starting at 14 weeks gestation, for a total of 14 weeks (i.e. to be completed by 28 weeks of gestation). All exercise sessions will be home-based and fully supervised by an experienced exercise physiologist. The exercise program will be implemented in accordance with the American College of Sports Medicine and the American College of Obstetrics and Gynecology guidelines. All sessions will be conducted on a stationary cycle ergometer.~Heart rate will be measured continuously during exercise to ensure that the exercise intensity is maintained as prescribed. In addition, blood pressure and rate of perceived exertion will be monitored at 10-min intervals. Perceived exertion will not be allowed to exceed a rating of 14 (i.e. somewhat hard)."