There are some Kung Fu and Qi Gong styles that involve dynamic tension, expressed in different cultural terms. Like Punching Fist with Angry Eyes from the common Eight Pieces of Brocade exercises. Unlike in western culture, though, it's not done for muscular developement, but for what we would see as balancing the nervous system.
Bruce Lee's interest in Dynamic Tension was more from a westeren biophysical perspective, though. While he had some traditional Chinese beliefs (he was obsessed with the idea of a family curse and was big into trying to use traditional mirrors to keep away evil), he never felt bound by them, especially when it came to martial arts training. His style actually owes alot to his study of western boxing and fencing. He was especially influenced by Cassius Clay/Muhammed Ali.
Some Kung Fu and Qigong masters said he overdid a focus on dynamic tension and hard training, and that contributed to his early death. It's plausible. He died from a brain aneurysm. Not only was he experimenting alot with steroids but he was dehydrated (Hong Kong has weather sort of like Florida in its heat and humidity) and probably in a state of overtraining, so the traditional belief isn't without merit. He definitely was a high strung, achievement oriented person, based on interviews I've had with people that knew him. (like me, he was also a dragon, according to the Chinese calendar system, which usually signifies a person with that kind of temperment).
Besides studying under Bruce Lee's lineage, I also have experience studying Chinese
Neigong or soft, internal kung fu styles like Tai Chi or Bagua. They have a very different approach, and are more like Aikido in their philosophies.
