Mini Power Loops can be used for a full lower body workout to help activate and strengthen the glute, hamstring and quadricep muscles. This individual Fitness-Mad Extra Strong Mini Power Loop is perfect for buying in bulk for physios, clubs and gyms, or for those looking for a lightweight individual band to include in their gym bag or home gym kit.. Features -. Dimensions - 35cm (13.7\") diameter. Strength - Extra Strong. Individual band only. Warning - these bands are made from latex, do not use if you suffer from a latex allergy. Do not stretch these bands more than x2.5 their original length.