You have many options for loosening tight leg muscles. Stretching is one. You can passively hold a leg stretch for 30 seconds or more (static stretching), do controlled movements that put your leg muscles through their full range of motion (dynamic stretching), or any number of other stretching methods. Movement in general can also be helpful for tight leg muscles, especially if they’re stiff from sitting. Try gentle activities like walking, yoga, and swimming. Self-myofascial release (SMR) techniques like foam rolling are another great way to increase joint range of motion and ease tension in tight muscles.