Please choose the correct ending to complete the given sentence: Health: [header] How to exercise to lose belly fat [title] Walk it off. [step] Walking is a great way to burn fat and work your abdominal muscles. Walk for 30 minutes at least 5 times a week.

Ending1: Start off slow and move your hands all the way around your belly. Repeat these movements about two times each week until you start to feel your belly muscles or gets tired. Ending2: To burn the most calories, tighten your abdominal muscles while you're walking. Walk at a brisk pace, where you can talk normally but would have trouble singing, and don't forget to swing those arms! [substeps] If you need to, start out with shorter walks and work your way up to 30 minutes. Ending3: Be intentional about what types of exercises you do. Going too long without walking can lead to crash dieting. Ending4: After running, walk to not only cool your body down but to lose some fat. If you feel like running , 30 minutes is definitely cool.

Answer format: ending1/ending2/ending3/ending4