I’m in the exact same boat! I have extremely sensitive skin and had the same problem. I play 3hrs of tennis a day and changing the site was a pain for both me and the insurance.
Here are some of the things the endo at the conference suggested -
(1) eat consistently throughout the workout, not just once or twice.
(2) try to use a shorter needle to avoid injecting into the muscle & don’t inject into the part of the body you plan on using the most (i.e if you are lifting weights, inject into the leg) injecting into muscle and then using that muscle doubles the reaction rate of the insulin
(3) work out in a cooler place (if possible). Heat increases the blood flow to the skin and therefore you react faster to insulin. This is why you are told to never shower within 15 minutes of taking insulin and if you live in a warm place (like me) you should lower your insulin amounts and quick sugar intakes in the summer
(4) going low later in the day/night is the result of something called DOH (delayed onset hypoglycemia). Basically whilst you were working out, because it was at such a high level, you not only used up the glucose from the food you ate, but you used your body’s glucose storage - meaning you have to fill it back up. So if you don’t fill it back up, you’ll go low later on. The best solution for that is, I know you don’t want to hear it but… eat more during and after the work out. With DOH, you can go low for 6-10 hours after you are done working out. Also, keep in mind that the exercise increases your sensitivity to insulin for pretty much 12-24 hours. So make sure you lower the insulin intake aswell, or the 24 hour insulin slightly (not as effective for me)
(5) if you are working out right after eating, don’t inject, at all. When you work out straight after eating you do something called delayed digestion. If you eat dinner and then go run on the treadmill, your body doesn’t start to digest that food, it just sits in your stomach, but the insulin you took keeps working. So you’ll crash low and then spike high after you are done and start digesting the food. Solution for that is, although it may sound counterintuitive, inject after the workout, not before.
(6) If you are working out within two hours of eating, lower your bolus (I lower mine by 50%)
(7) make sure you are eating high glycemic index foods, they’ll keep your blood sugar up. Also, make sure you eat enough to replenish what you are using (basically what I said in 4). For example an hour of singles tennis, for my weight (160) uses 65-75g of carbs. meaning in a 3 hour practice I should be eating 200g of carbs (which let’s be real I’m never going to do as that’s a lot but I pay for it later on!)
Hopefully this helps, I know it’s a lot of info haha!
oh - I have a friend who is a ballet dancer so I’ll forward your shoe question to her