Exercise speeds absorption of insulin, so avoid injecting into parts of your body that will be exercised during your activity. If you are planning leg muscle exercise (jogging, skiing, cycling), inject insulin into the abdomen or arms. For arm muscle activities (scrubbing walls, doing push ups, washing the car), inject into the abdomen or leg. For sports that use all body muscles (swimming, basketball), the safest place to inject is the abdomen.
Always watch for signs of hypoglycemia (see Chapter 8). Don't wait until you finish exercising to treat a reaction. Stop immediately, treat the reaction, and wait 5 minutes before resuming activity. Exercising at the same time each day is beneficial, but not always possible. Keep in mind your insulin peak times and avoid exercising at these times. Also be aware that exercising at very high or low temperatures may cause you to burn more calories.
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