According to Nina K. Hauptman for AZCentral.com, the main focus in obtaining thin thighs is to lose weight through a healthy diet and adequate exercise. Cardiovascular exercise is the best way to burn fat throughout the entire body, and ultimately the thighs appear thinner as a result. Targeted thigh exercises are unable to thin the thighs directly, but building muscle mass in the thighs helps tone their overall appearance.
Hauptman recommends eating a diet rich in fruits and vegetables. Carbohydrates do not need to be avoided, and whole grain foods, such as oats, quinoa and brown rice, are excellent options for maintaining a healthy diet. Proteins, including chicken, turkey and fish, are also important to building muscle.
According to Hauptman, cardiovascular exercise should be performed for at least 150 minutes each week in sessions of no less than 10 minutes. Hauptman advises that dieters maintain a healthy rate of weight loss between 1 and 2 pounds per week. This is equivalent to between 3,500 and 7,000 calories burned through controlled eating and consistent exercise. Anything above this rate of weight loss can signal that the body is nutrient deficient or is merely losing water weight. Extreme caloric restrictions and over-exercising should be avoided as this type of behavior has an adverse effect on the body and can actually slow down the metabolism.