Exercise apparatus

Abstract

A dumbbell may include a handle, a first weighted portion and a second weighted portion, wherein the first weighted portion and the second weighted portion are located at two opposite ends of the handle. In one embodiment, the first weighted portion has a cover and a receiving space, and the receiving space has a center receiving hole configured to axially receive one or more weighted units. Likewise, the second weighted portion has a cover and a receiving space having a center receiving hole that can be used to receive one or more weighted units. In one embodiment, the cover can be threadedly engaged with the outer peripheries of the first and second weighted portions to prevent the weighted units from moving or falling out while the dumbbell is being used.

What is claimed is: 
     
         1 . A dumbbell comprising a handle, a first weighted portion and a second weighted portion, and the first weighted portion and the second weighted portion are located at two opposite ends of the handle,
 wherein the first weighted portion has a cover and a receiving space, and the receiving space has a center receiving hole configured to axially receive one or more elongated weighted units; and   wherein the second weighted portion has a cover and a receiving space, and the receiving space has a center receiving hole configured to axially receive one or more weighted units, and the weight of the dumbbell can be adjusted by adding or removing the weighted units.   
     
     
         2 . The dumbbell of  claim 1 , wherein the cover is threadedly engaged with an outer peripheries of each of the first and second weighted portions to prevent the weighted units from moving or falling out while the dumbbell is being used. 
     
     
         3 . The dumbbell of  claim 1 , wherein the weighted units are of the same weight. 
     
     
         4 . The dumbbell of  claim 1 , wherein each of the weighted units may have different weights, and the dumbbell itself may have certain weight without the weight units. 
     
     
         5 . The dumbbell of  claim 1 , wherein one end of one of the weighted units is removably received in the center receiving hole in the receiving space, and the other end thereof is removably received in a cover receiving space to further secure the weighted unit. 
     
     
         6 . The dumbbell of  claim 1 , wherein the first and second weighted portions are identical and symmetrically disposed at the opposite ends of the handle.