Be kind to stingrays while at the beach and work your glutes too!
You will need an elastic band or resistance band for this exercise. Place both legs inside the band. Take a step, but move slightly to the side and stretch band as far as it will allow leg to go. With the opposite leg, simply move it to meet the front leg. Once feet are together, move the other leg forward and to the side and have the back leg come up to meet it. You can measure this exercise in repetitions of one leg or both, or in distance.