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 pulling a laptop from the car can trigger a flare-up. Lucille says she often sees DOMS among “weekend warriors,” people who are not physically active most days, but engage in intense workouts when they have the time. She advises patients and trainees to increase the intensity and velocity of their workouts gradually. But it's not just working out that can lead to DOMS, Lucille says. Any daily activity that uses muscles that have not been worked recently—lifting heavy bags of groceries with your non