Why is Kung fu a Mercy?

In Egypt we name Kung fu for any sport belongs to Martial Arts, so Karate, Aikido and Taekando including this expression too.
Kung fu for me is not just a game, not a way to create muscles and to overwhelm the others. Kung fu is a way to live better and enforce your muscles, moral obligation and purify your soul to be a good one.
I am 36, practice martial arts since nearly 20 years, I have no fight before but I made a lot of friendship and spend a very good time in exercises. Kung fu has given me good health, good friends, and isolate me apart from unrest in my society. When I say Kung fu is mercy, it is my profound feeling. It is like a knife, has double faces used for caring killing. It is your choice, but I choose mercy and hope to stay like this.

Hit "Sandbag" and Relax

No need to be an expert in martial arts to do that, just hit a sandbag for 5 minutes, and tell me your feeling after that.We all have the same pressures, we all have the same troublesome life, do not fed up, bring your Sand Bag, and hit it like me in the video.It will make you relax and ready to face more pressures.