Use thickest TPE material on market, with good elasticity. You can wrap them around your hand a few times for more tension and a secure grip, or tie a knot and use them as loops, you can also double them up for more resistance. It can target any muscle, including arms, legs, hips, and abdominals make a body figure. Ideal for physical therapy, rehabilitation, pull-ups, bodybuilding, pilates, yoga, stretching, strength training, powerlifting and more.