Many good posts.
Correct training is what prevents major injury, not DDJ. Training must be done progressively increasing force over time. Training should not cause significant injury...if it does back off a little. A good jow should stop bleeding and yet increase blood circulation and get rid of bruising...paradox...but it is the herb combination that does it. As well it acts as a analgesic. A good jow along with correct training and massage will toughen up the tissues over time with no scar tissue formed at any point in the training.
Good luck in your training.
GHD
...ask for Kam
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"Fool me once, then shame on you. Fool me twice, then shame on me"