We know you have low-back pain. A whopping 80 percent of all Americans do at some time or other. And if you’re active, your chances of low-back pain are even greater because exercise, especially if you have a desk job, increases the likelihood of aches and pains in your lower lumber. Adding to the injustice is that few traditional treatments cure back pains. Studies show over-the-counter drugs like ibuprofen and Tylenol are ineffective, often only temporarily relieving symptoms, while seeing a chiropractor hasn’t been shown to provide permanent relief. What to do? Here are five things experts say can prevent and treat low-back pain.