STRETCHES FOR SORE MUSCLES: When you work out, your muscles contract and shorten, which can leave you feeling stiff. Stretching increases blood flow to the muscles to relieve this stiffness, lengthen muscles, and improve your flexibility for a greater range of motion (and lower risk of injury) the next time you work out. Use these yoga-inspired poses and stretches after your next workout, or anytime you're feeling stiff. Click through for the full workout from certified yoga teacher and New ...