Body Sport Loop Band, Latex, 12-Inch Long, 2-Inch Wide, Blue, Light Resistance. Need a workout to build up muscle with small, limited motions? Body Sport Loop Bands are the color-coded resistance bands that are designed to fit comfortably around both upper and lower legs. They are 12-Inch long, which restrains your movement to short bursts of exercise, giving intense burn with minimal motion. They are available in four color-coded resistance levels: Blue (Low Resistance), Yellow (Medium Resistance), Red (Heavy Resistance) and Green (Extra Heavy Resistance).