Please choose the correct ending to complete the given sentence: Health: [header] How to be motivated to exercise [title] Take the plunge. [step] The real trick to motivating yourself to exercise is to not think about it, and just throw yourself into it. Taking action and getting moving can stimulate a response in you emotionally and encourage you to keep at it.

Ending1: You might be dreading going for a run or lifting some weights, but generally once you're going your feelings will change. [substeps] Exercise allows more oxygen into your brain, which in turn releases more chemicals that make you feel good. Ending2: If you are following a workout, you want to make sure you're up to a challenge. Think about all the reasons why you'd rather be exercising outdoors so you're not afraid of your surroundings. Ending3: Ideally, drive yourself crazy every 30 minutes or so for five minutes to a minute every two days. Do something easy to do like doing one new workout or one new project that calms you down. Ending4: [substeps] For example, you can take a walk. There is a huge difference between going for a bike ride, and jogging.

Answer format: ending1/ending2/ending3/ending4