| 摘要 |
A fitness training aid including a flexible, impermeable membrane defining a chamber fillable at least in part with a first flowable material and at least in part with a second flowable material, at least closure coupled to the membrane, at least one gripping member coupled to the membrane, and at least one wall positioned within the chamber. The closure positionable between at least one open position enabling the first and/or second flowable materials to be introduced within the chamber, and a closed position that seals the first and/or second flowable materials within the chamber. The at least one wall and the membrane define at least first and second compartments within the membrane. The at least one wall enables fluid communication of the first and/or second flowable materials between the first and second compartments. |
