Adjustable Fitness Aqua Bag, Sandbag Alternative for Core Strength Training

Why do we use aqua bags?

Aqua bags are alternatives for sandbags that contain water rather than sand. But unlike traditional sandbags whose contents are "fixed" sands, the water in aqua bags is flowing and so would "react" to your every movement by flowing unpredictably.

The instability of water makes training harder and more complex; it even makes every workout different. The more water you add, the heavier it becomes; the more air filled in, the more unstable it is.