It's common for your muscles to feel sore after a workout, particularly if it's a new exercise for you or a more intense session. Experts call this delayed-onset muscle soreness (DOMS), and it happens after physical activity that puts an unaccustomed load on your muscles. Whether muscle soreness is mild and barely noticeable or extremely painful, there are several ways in which to relieve discomfort and possibly recover faster.
Source: Verywell Health