Matrix Strength Ultra Leg ExtensionMatrix Strength Ultra Leg Extension The powerful Ultra Leg Extension tones and builds quad muscles with efficient, comfortable movements. A self adjusting tibia pad makes it easy for anyone to find a comfortable position, while a contoured knee pad provides optimal cushioning behind the users knee on every rep. Angled seat and back pads encourage full quadriceps contraction, and a clearly marked pivot encourages correct knee alignment. Thumb switch
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