What is the stretchy band used in resistance training to add difficulty?

The stretchy band used in resistance training to add difficulty is a resistance band.

Resistance bands are elastic exercise tools that create tension as they are stretched. That tension challenges muscles during movements such as rows, presses, squats, curls, lateral walks, and assisted pull-ups. Unlike free weights, bands provide variable resistance: the farther they stretch, the harder the movement generally becomes.

The equipment is available in several forms, including flat therapy bands, continuous loop bands, handled tubes, figure-eight bands, and ankle-cuff systems. Color coding often indicates resistance level, although the colors are not standardized across brands, so users should check the manufacturer’s guide.

Resistance bands are especially useful for travel, home workouts, and rehabilitation because they are lightweight and take up little space. They are sometimes called elastic bands, but “resistance band” is the standard fitness-equipment term. A jump rope is designed for cardiovascular skipping, while a bungee cord is not generally intended for controlled exercise loading.