Following a weight-loss diet and exercise program can help a person lose body fat; however, it isn't possible to target specific areas of the body such as the buttocks and thighs, according to SFGate. Losing weight over the whole body while building muscle creates a slimmer and more toned appearance in the lower body.
People striving to lose weight need to create a caloric deficit by consuming fewer calories than they burn, explains SFGate. Gender, age, health, body fat percentage and lifestyle determine a person's total daily energy expenditure, or TDEE, and how many calories she needs to support daily activities. Generally, multiplying body weight by 15 or 16 provides a good indication of the minimum daily caloric requirement.
Dieters should subtract 500 to 800 from the caloric requirement to create a deficit of calories, but never go below 1,200 calories per day, states SFGate. A drastic reduction in calories causes metabolism to slow down, hinders weight loss and can lead to other health problems.
Following an exercise program burns additional calories, and the more intense the exercise, the more calories a person burns, notes SFGate. Dieters should strive for 30 to 60 minutes of vigorous exercise, five days per week, including weight lifting, aerobics, hill sprints, spinning or running. Weighted resistance exercise builds muscle tissue, which improves the appearance of areas carrying cellulite, including the thighs and buttocks.