The same movement can be performed with a resistance band tied just above your knees. They can be purchased online from everythingtrackandfield.com.

Starting with knees hip distance apart, press into the band as you raise your hips and push the knees away from your midline. Do 10-25 repetitions.

Try it on one leg. Shift the weight to your left leg and raise the right foot off the ground. After doing 10 reps on one side, repeat for the other leg.