MDUSA Sandbag Standard Trainer Shell Due to their versatility, simplicity, and proven results Sandbags are fast becoming one of the most popular functional fitness tools out there Sandbag training helps develop explosive power and strength in the lower, core, and upper body efficiently due to the instability of the load Create a multitude of functional workouts that includes movements such as cleans, overhead presses, weighted lunges or squats, and rotational pulls