Depending on the dieter's level of commitment, nutrition plan and exercise program, losing 50 pounds takes anywhere from two months to one year. A longer weight loss time indicates a commitment to a healthier lifestyle, giving the dieter a better chance to keep the weight off.
A normal diet of around 1,500 calories a day, along with exercise for 30 minutes three to four times a week, equates to a 1 or 2 pound weight loss per week. People who crank up the exercise to an extreme level, and limit calories and carbohydrates to the bare minimum may expect a 1/2-pound weight loss or more per day, depending on age and gender.
People who cut 1,000 calories a day experience a weight loss of 2 pounds per week, on average. A dieter who tracks what she eats is generally more successful in losing weight and keeping it off. A liquid meal replacement diet is one of the fastest ways to lose weight, but the extreme calorie restriction frequently leads to extreme muscle loss. The loss of muscle actually hurts weight loss, as muscle actually burns more calories than fat. Liquid diets lead to other problems, including irregular heartbeat, constipation and gallstones.