The SlingShot Grippy Hip Circle ($28) gives "an added level of resistance for so many leg and butt exercises," said Allison Jackson, NASM, a professional figure competitor and online fitness and nutrition coach. She recommended using it for challenging variations on squats, hip thrusts, and bridges. (Here are six more glute-strengthening moves to get the most out of your band.)
Even better news: beyond growing your glutes, a hip circle (also called a booty band) can help to ease knee pain, said fitness coach Nick Leyden, MS, CSCS. "What the hip circle does is create inward tension on the legs, so you have to fight out against the band during a squat," he told POPSUGAR. That strengthens the part of your glutes called the gluteus medius, which helps to stabilise your knees and balance out the muscles along the inside and outside of your thighs. "Basically, you are going to have a nice ass and be pain free too," he said. We're sold.