Love it or hate it, running is the country's most popular sport. But why exactly do some people live to run while others would rather, well, die. Part of it could be due to the covetous "runner's high," an endorphin rush brought on by intense exercise. The good news is researchers recently confirmed that runner's high is legit and even better, you can train yourself to get one by slowly raising the intensity of your exercise.
Make it happen: You don't have to run to get a runner's high—any cardio activity will work! Start at a pace you are comfortable with and then slowly increase the intensity. You may not feel it right away, but the scientists say as your fitness level increases over time, you'll transform into one of those super-peppy Saturday morning runners you used to hate.
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