yes but isnt milk also a source of sugar. The patient was not diabetic so it was not for the insulinogenic effect. That was something I did not know though. Thanks
Diabetic has nothing to do with wanting an insulin spike post workout (there is much debate on to whether or not that is a good thing, I say no.)
Insulin is highly anabolic and is responsible for shuttling nutrients into cells for energy so some say it is good to have an excess post workout. Unfortunately it is also very efficiant at storing fat in a caloric surplus so a balance should be sought. Additionally, your body can become resistant to the effect of insulin requiring larger amounts to be effective.
^^^ Condensed, simplified version.
Many feel there is a limited window of opportunity post workout to replenish glycogen stores and drive nutrients into cells for growth and that is why they use a high GI sugar like dextrose immediately after workout to achieve said insulin spike. I say this is poppy****. You body will effectively replenish over a span of many hours and unless you are a severely depleted endurance athlete, the simple sugar route just doesn't add up in my mind. But I don't know diddly.