Please choose the correct ending to complete the given sentence: Health: [header] How to accelerate weight loss naturally [title] Combine aerobic exercise and strength training. [step] A combination of a variety of exercises can help to speed up weight loss. Both cardio and strength training provide you with different types and amounts of calories burned.

Ending1: Remember that to lose weight, you need to burn fat and build muscle [substeps] Aerobic exercise is primarily used to raise heart rate and burn calories immediately. Types of aerobic exercise include: running, walking, swimming, and biking. Ending2: The benefit of both is it's true you make you burn calories at the same rate, which can make your weight loss easier on your body. [substeps] Aim to increase your aerobic activity by 50% for healthy weight gains. Ending3: Some studies show that working out or strength training more frequently can help with weight loss. [substeps] Aerobic exercises like cycling, swimming, hiking, or dancing are great ways to burn calories without burning all your calories. Ending4: [substeps] Talk to your doctor or a medical nutritionist about building a healthy diet and reducing your daily calories. Regular exercise helps you maintain a healthy weight and reduce added calorie intake.

Answer format: ending1/ending2/ending3/ending4