For an effective and convenient way to lose weight, circuit training is my first recommendation. Circuit training involves performing various resistance training exercises, in a row, with little rest in between movements. For example, when you begin your routine you do 20 reps of bicep curls, then you immediately move on to push ups, then immediately on to leg curls, and so on. This is an extremely effective way to train because you are putting your muscles through high intensity and also getting a cardio effect because of the little rest. This gets the heart rate up and the body ready to burn fat.  This combination of resistance and cardio allow for many more calories burnt than traditional forms of exercise.  In addition Circuit training is a type of interval training.  Interval training is a great way to increase the body's ability to burn calories when it is at rest. This means hours after you are done working out, you are still burning fat. This benefit is on existence in slow boring cardio like running on a treadmill. Circuit training  increases the amount of oxygen that a person consumes after exercise, and therefore, increases the number of calories that a person burns throughout the day.   Circuit training is also a convenient way to exercise.  It maximises the total exercise volume (number of sets, repetitions, and amount of weight) completed in a period of time.  Circuit training is also convenient with the time you spend in the gym. Circuit training usually takes only twenty to thirty minutes, which means you can get in and out of the gym, and get on with your day.   Circuit training is the perfect type of training for anyone looking to lose weight while not spending hours and hours in the gym.