You probably know the feeling of waking up sore and wobbly-legged the day after a long hike or intense workout. There’s a name for that: delayed onset muscle soreness, or DOMS – and there are things you can do to stop it. Dr. Holly Lucille , a naturopathic physician and CrossFit trainer in West Hollywood, California, says DOMS is caused by microscopic tears in muscle fibers that release chemical irritants, triggering inflammation. Once you have DOMS, simple tasks like lifting grocery bags or