I've been exercising alot and I'm having my BS swing from 120 to 46 in 20 minute just from bike riding. I'm not taking any fast acting insulin just 42 units of lantus once a day before bed. My a1c is 6.4. I don't understand why it's bottoming out so quick. I'm generally eating 72 carbs be for I go ride and it still won't help.
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