People are mostly confused when it comes to exercising for shedding kilos. Whether they go for a short HIIT session for rapid calorie burning or need to opt for activities which go on for a longer time. It is really hard to decide. Well, according to the new study published in the journal Medicine & Science in Sports & Exercise, one needs to spend a lot of time in the field shedding sweat to lose weight. For a person to lose about 1 pound that is approximately 1/2 kilos per week, they need to burn 3000 calories, which requires an abundant amount of exercise. As per the study, to burn this much calories one needs to exercise for about 300 minutes every week or an hour per week for five days.