The Multifunctional Portable Trainer is the king of all equipment for training your core muscles . It is a Great Way to Build Core Strength, Improve Balance and Stability. It is more effective Than Crunches and Sit-ups. This simple exercise tool helps you workout a large number of muscle groups. It's also a Full-body Cardio Workout. It strengthens Joints and Ligaments.Below are the amazing benefits of this Multi-functional AB Roller Ab Wheel Rollouts Are a Great Way to Build Core Strength, Improve Balance and StabilityAb roller workouts improve core strength because you need to stabilize your spine in order to perform the exercise correctly. It also helps in improving your body's ability to balance which comes in handy when doing sports. For example, integrating ab wheel rollouts into your workout will make you better at sports such as football because body balance is a key element in that game.2 An Ab Wheel Is More Effective Than Crunches or SitupsAn ab wheel can do what 100 sit-ups cannot because it engages your core muscles from head to toe and helps you build up a nice six-pack quickly