preferably a strong and lightweight material that enables a reasonable weight to be maintained for the bag 2 of the present invention a preferred material for the support core 6 is pvc pipe the support core 6 may be of a diameter from about 3 inches to about 10 inches and a length from about 16 inches to about 96 inches the support core 6 may be filled with sand or other suitable material to provide weight and mass to the bag 2 of the present invention which anchors the bag 2 and prevents it from flying away from a user when the user impacts the bag 2 with a kick or punch or other impact or striking motion the support core 6 may have a support cable 28 running through it the support cable 28 may be any suitable material having sufficient strength and durability to support the weight of the bag 2 of the present invention such as nylon rope hemp rope steel cable chain and the like alternatively the bag 2 of the present invention may not have a support core 6 but rather only a cushion core 8 and an impact core 10 in this embodiment of the bag 2 of.