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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.
Points to Remember. 1  Insulin is a hormone that helps cells throughout the body absorb glucose and use it for energy. 2  Insulin resistance increases the risk of developing type 2 diabetes and prediabetes. 3  The major contributors to insulin resistance are excess weight, especially around the waist, and physical inactivity.