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1 Insulin sensitivity is increased, so your cells are better able to use any available insulin to take up glucose during and after activity. 2  When your muscles contract during activity, it stimulates another mechanism that is completely separate of insulin.
Vinegar, green tea, nuts, and spices are among the foods that increase insulin sensitivity, improving the bodyâs ability to store the carbs you eat as muscle glycogen instead of as fat. For example, vinegar improves pancreatic function so that your body releases less insulin in response to the carbs you eat.