Hollow core foam roller that features elevated and opposing curves to squeeze and stretch muscles as you roll, helping to push blood and oxygen to sore muscle tissue. The TriggerPoint CHARGE Ridged Foam Roller takes foam rolling to the next level with opposing ridged curves that replicate advanced massage therapy techniques to enhance blood and oxygen circulation and accelerate recovery. Opposing high and wide ridges stretch muscles as they are rolled, while high and narrow ridges squeeze the muscles—these opposing forces combined with bodyweight pressure help to push blood and oxygen throughout the body, and quickly transfer the nutrients needed to repair broken down tissue. Ideal for use immediately following physical activity, on both the lower and upper body, including calves, adductors, quadriceps, hamstrings, upper back, and lats. The TriggerPoint CHARGE Ridged Foam Roller is recommended for advanced foam rolling of dense muscle tissue. Foam roller with high and wide opposing ridge curves replicates massage therapy techniques to enhance blood and oxygen circulation and accelerate recovery