Speed Sac is a variable weight speed sled designed to strengthen lower body muscle groups
Speed Sac
Build explosive leg drive and speed right of the blocks with the Speed Sac. This variable weight sled allows you to strengthen your lower body muscles by resistance training like metal sleds. With removable weights, the Speed Sac allows you to adjust the towing resistance. You can also use the handles on the bags to perform various upper and lower body exercises such as lunges or front raises.
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