Here's a simple yet challenging way to firm and tighten your buttocks and thighs. If you start to incorporate this move into your exercise routine now, you can help get your lower body in shape for the summer.
Lie on a padded, flat surface and place your feet hip-width apart atop a round 36-inch foam roller. Make sure that your feet are flat, with your heels and toes on the same level. Extend your arms straight alongside your body with your head resting on the floor.