Please choose the correct ending to complete the given sentence: Health: [header] How to use exercise to help you overcome addiction [title] Go for walk. [step] Walking can boost dopamine levels. Dopamine is the neurotransmitter that the brain produces when experiencing pleasure.

Ending1: Walking can challenge your nervous system by raising your blood sugars. After sustained exercise, your bloodstream releases dopamine, which can leave you feeling good physically but also mentally. Ending2: While it hurts at first, walking is a good lifestyle choice for a person with a higher level of dopamine. Research shows that people who will exercise for 10 minutes a day gain at least 70 percent in dopamine. Ending3: As your body releases dopamine, you begin to see' benefits' if you exercise regularly. [substeps] In particular, take short jogs after a meal or before bed. Ending4: When you engage in addiction behavior, your dopamine production increases-what's why it feels good to " get high. " but you can also feel good by walking around the block or hiking in the woods.

Answer format: ending1/ending2/ending3/ending4