During the winter months I am always looking for fun and new ways to change up the same old workout routine. I stumbled across this 30-day Squat Circuit challenge on PopSugar and thought it would be a great challenge to pass along to my fabulous readers! Tried and true this workout will help you build up endurance and build muscle. Give it a try. This workout definitely helps give your backside a workout and can certainly enhance your present workout. Let me know how it works for you!