Studies reveal the reasons why numerous Americans who maintain a regular exercise routine find it challenging to achieve weight loss. Persistent elevation of cortisol levels can lead to fat accumulation. Insulin resistance, impacting about one-third of Americans, inhibits effective fat burning. Insufficient sleep hinders the hormonal reset necessary for optimal metabolism. Additionally, after six to eight weeks, the body adapts to exercise, significantly lowering calorie expenditure from repetitive workouts, necessitating frequent changes to fitness programs.
