When they

do this, their punches are not solid ones, their fingers act as shock absorbers. If you know what handed your opponent is, being left or right handed, you need to circle your bag in the direction away from their power hand. For example, if your opponent is right handed, circle to his left. This will keep you out of his power range and keep you from getting knocked out. Keep on the balls up your feet. Never rest on your heels, because if you receive a solid blow you will be knocked backwards or even down. Keeping on the balls of your feet will help you maintain your balance. Always mix up your combination of punches.