hi Brent,
Blood sugars below 70 are too low. Ideally, you want to keep your sugars around 90. What is your fasting sugar, first thing in the morning?
You seem to be hypoglycemic right across the board. And my hunch is that you're not eating enough, not just carbs but not enough PROTEIN. To help keep blood sugars more stable, you'd do best to have 5 or 6 smaller meals and snacks that contain protein and some fat (never eat carbs alone) .. rather than 3 large meals a day. How are you counting your carbs? Did you know that you can subtract any grams of fiber that's in a food from the total carbs listed, and that's the number you use to calculate your carb intake. For example, a stalk of broccoli has 7.9g total carbs and 4.5g fiber. You'd count it as 3.4g carbs. If you're not subtracting fiber grams, you could be eating way fewer carbs than you think.
Exercise-induced hypoglycemia is usually more of a concern for Type 1's who inject insulin, but some Type 2's do have problems as well. If you're doing weight-lifting/ resistance exercise, you'll use up your muscle stores of glucose (glycogen) quickly. As well, resistance exercise improves insulin sensitivity, so the blood sugar gets transported into the cells (and out of the blood) more efficiently ... Which means if your sugar is lowish to start with, the exercise is going to make it drop even further, and will stay down for a prolonged period after the exercise session is over.
The treatment is prevention ... ie, eat a small amount of carbs and protein before the exercise, and during if it's for a prolonged period of time. Dr Richard Bernstein has a detailed chapter on exercise and blood sugar control in his book
Dr. Bernstein's Diabetes Solution. I highly recommend that you get your hands on a copy of this book. He promotes a low-carb diet and tight blood sugar control, and many practical tips for achieving normal blood sugars. And preventing them from dropping too low
In fact, his recommendation is that you get the blood sugars stabilized FIRST before embarking on a rigorous exercise program.
hth,
Doreen