Get your stability ball and feel the burn with your upper and lower body. With something that seems so simple, we think you’ll be blown away at how fun and challenging this ball workout is. Not only will you notice your upper and lower body working, but your core will be on fire too. Yay!Crush your fitness goals with Skimble’s beginner to intense exercise and training videos. Download the free Workout Trainer app on your Android & Apple devices and play a follow-along workout today! If you’re new to Skimble’s Workout Trainer app, our ‘Workout of the Week’ challenges are a fun and fresh way to stay fit. Remember, if you want to be the first to know about new content drops, be sure to have your Workout Trainer notifications turned ON in the app. Follow certified personal trainers and other members of the community to stay motivated.