Please choose the correct ending to complete the given sentence: Philosophy and Religion: [header] How to get away from reality [title] Exercise. [step] Exercise can be a good way to get your mind off of the world around you, while also making you into a stronger, healthier person. Scientists have established that exercise has some natural neurological effects that make us happier.

Ending1: Doing activities that you enjoy can also improve your mood, which is a benefit when you're trying to cope with an emotional rock barrage. [substeps] Both physical and mental health professionals recommend walking away from reality for an amount of time before you head home, and want to incorporate more physical activity into your daily routine. Ending2: Long distance running, for example, will eventually cause a " runner's high, " but even short workouts make us feel better. [substeps] Thirty minutes of brisk walking per day is enough to significantly decrease anxiety and depression. Ending3: In addition, exercise stimulates cell growth in our bodies which reduces stress on the brain, thus improving immune function. [substeps] Get out to go for a walk around the block or to catch a friends run through the park. Ending4: Include some easy workouts in your daily routine like doing ground sports or hiking. [substeps] Start with light cardio to see where the muscle groups are strongest.

Answer format: ending1/ending2/ending3/ending4