These color-coded, natural latex bands range in weight from extra-light to extra-heavy. Each band is marked with its resistance level. You can use them for recuperative purposes during physical therapy and to enhance stretching, strengthening, and muscle-toning workouts.

A clinical assistant professor at the Decker College of Nursing and Health Sciences at Binghamton University in New York likes prefabricated loop bands because you don’t have to cut and tie them off before use.

“Loop bands are convenient and ready to go. No matter what your commitment level is on any given day, the most convenient method is usually best. If the band is already fabricated in the shape you need, you’re more likely to use it,” he says.

If you’re new to loop resistance bands, a 141-page e-book, video library, and printed instruction manual will help you get started and stay focused. Plus, the kit comes with a travel/storage case and a lifetime guarantee.