Hello, the healthiest way to lose weight by exercising at home is to combine diet control with strengthening exercise. Methods 1, 25 sit-ups, relax and prepare for the next movement. 2. There are 50 vertical leg lifts on the left and right legs. 3. Lift two dumbbells weighing 5 kg, 25 times for each arm. 4. Jump 100 times and keep your arms parallel and straight forward.