Wing Chun Kung Fu Martial Arts mainly focuses on the sensitivity and speed of strength. And for acquiring these skills one need not to have any muscle tension and needs to be relaxed. https://playrsclub.com/muscle-not-enemy-wing-chun-kung-fu/

1. Wing Chun Kung Fu Martial Arts mainly focuses on the
sensitivity and speed of strength. And for acquiring these
skills one need not to have any muscle tension and needs
to be relaxed.
• Workout is required in routine, which includes
weightlifting and cardio exercises, but remember not to be
so tense
• Tensing up is not to be done in Wing Chun Kung Fu
martial art because that will inhibit your sensitivity of
strength to the other person’s movements.

2. Tensing up will also help in decreasing reaction time and lead
to faster muscle soreness, because the muscles are constantly
clenched.
• In Bicep curl, your arms are hanging down at your sides, with
weights on both hands. Then you curl your arm upward in an
arc until motion is no longer possible, at which point you lower
the weights back down. The point at which your muscles
experience the most tension is when they pass through the
halfway point of this arc, meaning they are NOT at full tension
for the majority of the curl. In other words even during your
workout, you don’t spend the majority of the time being tense.

3. •Fitness routine also includes martial arts training. One
should do martial arts training more than lift and then if
any possible adverse effects is there should be nullified.
•As for weightlifting and more muscle mass reducing the
speed, there is so much evidence to the contrary that one
hardly even need to spend any time on it.
• In the world of Wing Chun Kung Fu, martial arts and
sports, all need to do is to look at the blinding speed of
muscled men.