All Wing Chun students and wing Chun practitioners practice the above 108 movements form on a daily basis. Over time this develops all the proper muscles , hand positions, power and proper relaxation to make the art work.
The form starts of with the STANCE to train the leg muscles. This is the basics for every Kung Fu style. Without properly developed leg muscles you cannot maintain your balance and none of your techniques will have any power.
Next you learn to always defend and to attack the CENTER. The crossing of the hands down and up at the start of the 108 form just defines where the vertical center-line is.
The third thing is to train the correct muscles to have a powerful PUNCH. If you do not have a powerful punch, then you have nothing.
In the video below, Reza, our main combat instructor who has more than 40 years of fighting experience explains the basic ideas for training the Wing Chun straight punch. We have many other punches for practical use but first everyone must learn the straight punch.