Suffering From Muscle Soreness? Guerin Massage Roller solves all your muscle problems. Guerin Massage Roller is a ‘stiff’ stick, which allows you to reach all muscle groups of arms, head, neck, waist, shoulders, back, legs, and feet. Thinking what else it does? Just have a look! Recovers Tired Muscles Reduces after Exercise Soreness. Increase Circulation of your Body. Treats Knots and Sports Injuries. Eliminate the Trigger Points and Tightness in your Muscles.