IF YOU OWN A Heavy BAG, YOU NEED THIS BOOK The Heavy bag is one of the oldest pieces of workout equipment.
In most cases, they are hitting it incorrectly, developing dang.
Impatiently, they rush out to their local sporting goods store, buy a bag and begin wailing on it without a care in the world.
Unfortunately, most people don\'t know how to properly use the Heavy bag.
It is regularly used by boxers, Mixed Martial artists, self-Defense students, and fitness enthusiasts.
IF YOU OWN A Heavy BAG, YOU NEED THIS BOOK The Heavy bag is one of the oldest pieces of workout equipment