20-Minute Ab and Butt Workout Guaranteed to Leave You Sore Tomorrow
It's time to get specific and target your the abs and glutes. Why? Because strengthening these two areas can improve your athletic performance and help prevent injury. This workout only takes about 20 minutes from warmup to cooldown, so it should be a breeze to fit into your day. In the first circuit, we recommend using 10-pound weights, but these moves will still be effective with lighter weights or no weights at all.