The weight of the bag will force one to find the connection with one's center. If one loses the connection, it will cause a breakdown in one's posture and stance, with a loss of balance as the result. Further, the exercise teaches one to maintain that connection while keeping one's arms extended and parrying at attack. Consistent daily practice is an integral ingredient for success. For best results, one should practice 20 minutes in the morning and 20 minutes in the evening.
Sporadic training can cause injury.
With continual practice, one will achieve a great amount of connected force to apply to one's art. To achieve the best results, one should seek a knowledgeable Sifu for guidance and instruction. This calls to mind how ancient monks in the Shaolin Temple would practice with indomitable spirit to the point of laying the imprint of their years of training on the stone floor. We, as martial artists, can exercise this same virtue in our daily lives, bringing to life a small part of the glory and excellence of Shaolin Kung Fu. It is my heartfelt desire to lay my imprint on Shaolin training methods of today through the use of traditional apparatus to foster this same indomitable spirit in the new millennium.