Our fictional character is called Alice and she is a swimmer who trains 5 times a week. Her normal food intake would maintain her weight at about 45 kg. However, recently, one of these fast food giants, McDonald’s fast food restaurant had opened near her home. After her swimming training, Alice now has a daily routine in which she will consume an upsize meal for lunch, consisting of a main course, fries, and a drink. Before we move on to exploring the effects of consuming fast food on a regular basis on Alice, let us define some terms.

 The term “calories” is usually thought to be something that makes people fat   or gain weight. Hence, to start off, a calorie is the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius. The calories in food are what give the energy to fuel our body.

Generally, a large person will require more calories than a small person, an active person will require more calories than a sedentary person.