Calculate your Body Mass Index and find out if you're in good shape. While inserting your data you will be able to verify if your weight is included in the normal range.
If you see this image it means that your weight is in the normal range. Otherwise you will immediately be able to understand if you need to lose or to gain weight.

It is a fast method to measure the mass (weight) of an individual comparing it to an ideal weight. The index doesn't make any distinction between fatty body mass and lean body mass and it is then inaccurate while measuring extremely overweight and muscular individuals, slim individuals or pregnant women. The index value is calculated comparing mass and height and it is extremely efficient when measuring adult individuals (20 to 65 yo) and children or teenagers (2 to 20 yo). The traditional formula BMI=(weight(kg))/(height(cm)^2) is commonly used when measuring children and teenagers, while another formula proposed by Oxford University Prof. L.N. Trefethen is mainly used for adults: BMI=1,3*(weight(kg))/(height(cm)^2,5). The latter represents an evolution of the traditional formula whose limit is to provide an inaccurate value when measuring very tall individuals or very small ones. For more details please refer to the sources mentioned in the website's footer section.

It is calculated using various algorithms based on gender, age, weight and height. For more details please refer to the sources mentioned in the website's footer section. Daily caloric needs are influenced by three main factors:

1) BMR, Basal Metabolic Rate: it is the energy expenditure of an individual at resting-state, representing the amount of energy spent for vital metabolic functions. It represents approx. 45-75% of the total daily energy expenditure (45% for very active individuals, 75% for mostly inactive ones).

2) AEE, Activity-related Energy Expenditure: it is the amount of energy required to perform our common daily activities like standing up, walking or even doing sports. This energy cost can be calculated multiplying the BMR by coefficients that measure the expenditure of physical activities deriving from the Metabolic Equivalent of Task (MET). MET represents the relation between the amounts of energy spent for a specific physical activity and the energy spent at resting-state. E.g. 1 MET is the energy spent by a person sitting down and resting, 2,2 MET a brief walk in the park and so on.

3) TEF, Thermic Effect of Food: it is the amount of energy spent while digesting and absorbing nutrients. It represents less than 10% of the total daily energy expenditures and it is then usually ignored while calculating the daily caloric needs.
For further details please refer to the sources mentioned in the website's footer section.

* MET may vary due to many physical and environmental factors and it is then calibrated on the average energy expenditure of a 70kgs individual. MET may then be inaccurate while estimating the energy expenditure, but it represents a practical and quick approach to evaluate the individual's physical activity.

Enter your data and find out what your ideal body weight is. This way you can figure out what the expected weight should be combining, for example, age and height. Moreover, you can estimate how many kilocalories you're supposed to increase or decrease to reach your ideal weight. The calculation formulas are based on officially published studies (please refer to the sources mentioned in the website's footer) and can help you understanding which actions you should take to obtain your ideal weight. The ideal weight concept corresponds to the average weight included in a specific range calculated for each age-height combination. It has to be considered as a reference level and not necessarily as a specific target weight.

Calculate your Body Mass Index, verify if your weight is included in the normal range and find out which actions you should take to get closer to your ideal body weight.
Your data will automatically generate diagrams that will help you understanding how much your weight deviates from the ideal one.

You will also find out how many kilocalories you eat and how many you would eat if your weight would correspond to the ideal one. The difference between actual and ideal kilocalories levels will help you discerning what you're supposed to do in order to get back in shape.

Basal Metabolic Rate:
CJK Henry (Oxford Brookes University, UK) 2005, 'Basal metabolic rate studies in humans: measurement and development of new equations' - Public Health Nutrition, 8(7A), 1133-1152.
BMI ranges:
World Health Organisation, WHO, 1995, WHO, 2000 and WHO 2004
Centers for Disease Control and Prevention, boys and girls Body mass index for age percentiles
http://www.cdc.gov/healthyweight/assessing/bmi/childrens_bmi/about_childrens_bmi.html
BMI adults formula:
http://www.bbc.com/news/magazine-21229387
http://people.maths.ox.ac.uk/trefethen/bmi.html
Metabolic equivalents:
M. Jette', k. Sidney, G. Blumchen (University of Ottawa, Canada) 1990, 'Metabolic Equivalent (METS) in Exercise Testing, Exercise Prescription, and Evaluation of Functional Capacity' - Clinical Cardiology, 13(8), 555-565.
Physical activity:
U.S. Department of Health and Human Services Web site [Internet]. 2008 Physical Activity Guidelines for Americans. Atlanta, GA: U.S. Department of Health and Human Services.
http://www.health.gov/paguidelines.

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Last Modified: 01/08/2016

Regular physical activity is essential for your health. It reduces the risk of chronic diseases and increases the probability of growing up and aging in good health. Physical activity should be part of our life at least three days a week. When inserting your data you can verify if your physical activity is sufficient or if you have to increase it. This assessment is performed using the American Government's 2008 Physical Activity guidelines (PAG 2008). The considered categories are: children and teenagers from 6 yo to 18 yo, adults from 18 yo to 65 yo and older adults (65+). Physical activity can be categorized in aerobics, muscle-strengthening activity and bones-strengthening activity (mostly for children and teenagers). It is good for your health if you always perform it in the right way; it is then necessary to ask doctors for advice in order to properly choose what is better for your health. And remember: physical activity is a lifestyle. Even preferring ladders to elevators and bicycles to cars can make the difference.
For more information please refer to the sources mentioned in the website's footer section.
SOME CLARIFICATIONS:
Physical activity must be performed gradually and progressively increasing duration and intensity. Warming up and relaxing exercises are recommended before and after the main activities (especially for vigorous activity). Time spent for warming up and relaxing your muscles (excluding stretching) can be considered as part of the physical activity when it is at least a moderate one.
Vigorous activity must be performed with prudence, especially if you're not yet able to manage moderate physical activity autonomously. Same criteria must be used for heavy activity and particularly for aged individuals.
Such recommendations are only addressed to healthy people without any particular clinical situation. Those who are not in good shape or experiencing some kind of clinical situation must adapt their physical activity to their present condition, possibly scheduling a progressive activity plan. Overweight individuals must set up a specific physical activity program that includes a constant monitoring of their weight. Keep in mind that performing different kinds of physical activity reduces the risk of injury or, in case of vigorous or heavy activity, overtraining.