home -> on-line catalog -> field equipment -> power, speed, stability -> power speed resistor Power Speed Resistor Power Speed Resistor One of the easiest and most effective training aids available to increase your rate of force production and develop maximum leg drive for top acceleration. - Strong nylon harness with padded shoulder strap & tubular steel handle with foam rubber grip. - Adjustable harness fits any size. $35 Qty: ©2010 BALL'S OUT! Rugby Goods. All rights reserved.