I have been taking insulin for over 55 yrs. I dont ride 2 days in succession because of massive delayed drop in blood sugar level in the 24 hrs after serious exercise. This didnt happen when I was young. I am also less sensitive to drop in blood sugar level. I set the alarm to wake in the middle of the night after riding to check the blood sugar. I ride 17 miles to work a couple of days a week if the weather is nice, and ride 50 or 60 miles with bike club on the weekend. I have my glucometer in a bento box on the front of the frame, so every 30 or 60 mins I can check without having to dismount.