Aquatic resistance ball filled with non-toxic granular material

Abstract

An aquatic resistance ball is provided that comprises a containment skin substantially filled with, and surrounding, a non-toxic soluble material such as salt. The containment skin is made of a water resistant material and the bulk density of the contents of the containment skin is greater than 1 g/cm3. The resistance ball is substantially spherical, ovoid or tubular in shape.

1 . An aquatic resistance ball comprising a containment skin surrounding and substantially filled with a non-toxic soluble granular material, wherein the containment skin comprises a water resistant material and wherein a bulk density of contents of the containment skin is greater than the 1 g/cm3. 
     
     
         2 . The aquatic resistance ball according to  claim 1 , wherein the containment skin is substantially spherical, ovoid, or tubular shaped. 
     
     
         3 . The aquatic resistance ball according to  claim 1  wherein the containment skin is sealed. 
     
     
         4 . The aquatic resistance ball according to  claim 1  wherein the non-toxic soluble granular material comprises salt. 
     
     
         5 . The aquatic resistance ball according to  claim 4  wherein the non-toxic granular soluble material is sodium chloride (NaCl). 
     
     
         6 . Theme aquatic resistance ball according to  claim 1  further comprising an inflatable bladder within the containment skin. 
     
     
         7 . The aquatic resistance ball according to  claim 6  wherein the inflatable bladder is inflatable via a valve in the containment skin. 
     
     
         8 . The aquatic resistance ball according to  claim 1  further comprising an outer skin surrounding the containment skin forming a cavity therebetween. 
     
     
         9 . The aquatic resistance ball according to  claim 8 , wherein the cavity has a valve leading thereinto to enable introduction of gas into the cavity. 
     
     
         10 . The aquatic resistance ball according to  claim 1 , wherein the containment skin is a polymer material. 
     
     
         11 . The aquatic resistance ball according to  claim 10 , wherein the containment skin is elastomeric. 
     
     
         12 . A method of making an aquatic resistance ball comprising:
 forming a containment skin having an inlet from a water resistant material;   filling the containment skin with a non-toxic soluble material via the inlet such that the containment skin substantially surrounds the non-toxic soluble material; and   sealing the inlet such that, when sealed, a bulk density of contents of the resistance ball is greater than 1 g/cm3.   
     
     
         13 . The method according to  claim 12 , wherein forming the containment skin comprises forming the containment skin in a substantially spherical, ovoid or tubular shape. 
     
     
         14 . The method according to  claim 12 , wherein filling the containment skin with a non-toxic soluble material via the inlet comprises filling the containment skin with salt. 
     
     
         15 . The method according to  claim 14 , wherein filling the containment skin with salt comprises filling the containment skin with sodium chloride (NaCl). 
     
     
         16 . The method according to  claim 12  further comprising forming an inflatable bladder internally within the containment skin. 
     
     
         17 . The method according to  claim 14  further comprising, after sealing the inlet, inflating the bladder via a bladder inlet valve located in the containment skin to modify an internal volume of the resistance ball thereby altering a bulk density to achieve a desired bulk density. 
     
     
         18 . The method according to  claim 12  further comprising forming an outer skin around the containment skin to form a cavity therebetween. 
     
     
         19 . The method according to  claim 18  further comprising, after sealing the inlet, inflating the cavity via a cavity valve located in the outer skin to modify an internal volume of the resistance ball thereby altering a bulk density to achieve a desired bulk density.