To use the calculator simply enter your details including the desired amount of weight you wish to lose and the time-frame (in days) in which you would like to lose that excess weight - (You can also use the calculator to plan weight gain.) For your convenience the calculator converts pounds to kilos, inches to centimeters, and vice versa. Or you can convert between Pounds Kilograms and Stones.
You’ll get a list of foods that you can eat on certain days and suggestions on how to prepare them, but it will be up to you to create your meals. The best part is, it comes with access to a private support group where thousands of other women are sharing their favorite recipes for Challenge-approved meals and TONS of support and motivation like this post from Christina:

Consistent with the view that in regards to weight loss, only net calories are important and not their source, there exist cases such as the Twinkie diet, where a person that solely counted calories while eating a variety of cake snacks managed to lose 27 pounds over two months. As effective as this can be, it is certainly not suggested. While the participant did not seem to suffer any noticeable health detriments in this particular case, there are other less measurable factors that should be considered such as long-term effects of such a diet on potential for developing cancers, heart disease, and diabetes. However, ignoring efficiency and health, sustained, significant reduction of caloric intake or increase of physical activity should result in weight loss, and counting calories can be an effective way to achieve this sole result.
Fitness-focused exercise also improves your strength and endurance, which makes activities of all kinds easier, and thus encourages you to be more active overall. And, since regular exercise also improves your energy level, confidence, emotional outlook, and self-esteem, it can help you get through weight-loss plateaus, when you’re not seeing the inches melt off as quickly as you’d like.

A calorie deficit is simply an energy shortfall. When you create a calorie deficit, you deprive your body of the fuel it needs to function. So, your body burns stored fat (excess weight) for fuel instead. A calorie deficit occurs when you cut calories by eating less than your body needs or burn extra calories with physical activity. You can also combine diet and exercise to create a calorie deficit.


It's a one-time investment you'll never regret. Here's why: Strength training builds lean muscle tissue, which burns more calories — at work or at rest — 24 hours a day, seven days a week. The more lean muscle you have, the faster you'll slim down. How do you start strength training? Try some push-ups or a few squats or lunges. Use your free weights to perform simple bicep curls or tricep pulls right in your home or office. Do these exercises three to four times per week, and you'll soon see a rapid improvement in your physique.
Real talk: It could take weeks or months to see the metabolic effects of exercise on the scale, and even then, building muscle, which is denser than body fat, could lead to weight gain. “Do what you like because it’s good for you,” Dr. Seltzer says, noting the way exercise is awesome for your heart, mental health, and more—and that not all measure of progress can be seen on the scale.
Your age, gender and body mass index (BMI) determine your “basal metabolic rate,” or how many calories you need each day to stay at your current weight. You need to burn 3,500 calories more than you take in to lose one pound (.45 kilograms). So subtract 500 calories each day from your base rate for a daily calorie goal that helps you lose about a pound a week.

Meal replacement — based dietary intervention compared to a structured diet and exercise program for both weight loss and maintenance had no distinctive influences on appetite, fullness, diet satisfaction, and quality. The structured diet group lost significantly more weight and maintained greater weight loss, but they reported more physical activity too that may have affected the results.[17]
To maintain weight, the number of calories consumed must equal the number of calories the body burns. For those trying to lose weight, the number of calories consumed must be fewer than the number burned each day. The most effective way to accomplish weight-loss is to cut back on calories by decreasing food intake, while increasing physical activity.
Intentional weight loss is the loss of total body mass as a result of efforts to improve fitness and health, or to change appearance through slimming. Weight loss in individuals who are overweight or obese can reduce health risks,[1] increase fitness,[2] and may delay the onset of diabetes.[1] It could reduce pain and increase movement in people with osteoarthritis of the knee.[2] Weight loss can lead to a reduction in hypertension (high blood pressure), however whether this reduces hypertension-related harm is unclear.[1][not in citation given]

“(Users) could range from people with conditions such as elevated blood pressure to families looking to make healthier lunch choices for their kids at school,” said Huffman, who collaborated on FoodSwitch. “The app is designed to meet people where they are. … I understand that some people will still be eating (Froot Loops), so we’re trying to help people find alternatives closer to what their interested in.”


Fathi, Y., Faghih, S., Zibaeenezhad, M. J., & Tabatabaei, S. H. (2016, February). Kefir drink leads to a similar weight loss, compared with milk, in a dairy-rich non-energy-restricted diet in overweight or obese premenopausal women: A randomized controlled trial. European Journal of Nutrition, 55(1), 295–304. Retrieved from https://link.springer.com/article/10.1007/s00394-015-0846-9
Also some research shows that the human body is primed to consume most of its calories during daylight hours. But the lifestyle is problematic for many: Because family meals and dinners with friends often are scheduled for after sunset, “people who try to stop eating after 7pm can’t do it every day for the rest of their lives,” says Dr. Seltzer, who supports an alternative strategy: Eating a hearty meal at your regular dinnertime.
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