Daoust,
There are two main points to
Tit Sin Kyun:
1) Learn it correctly. If you want an automobile that takes you places, it has to have an engine, generator, battery, transmission, linkage, differential, etcetera. It should be obvious that just a couple of seats in an auto-body, on wheels, just isn't going to get you anywhere, no matter how brightly it's painted, or where the paint was purchased.
2) Practice it consistently. This is metabolic training. It's not paranormal, and it's not a magic pill. It will require sufficient practice, on a consistent basis, period. One's result is directly dependent on the quality of one's efforts. How many days do you go without eating, sleeping, or charging your cell phone?
Tit Sin Kyun practice is no different.
That being said, you'll need to define the term you're using, "strength". For example, if you are a 98-pound weakling, who can barely bench press 100 pounds,
Tit Sin Kyun practice might help, but it's not going to give you the ability to bench 900 pounds. However, if you have an "Inch Punch", Tit Sin Kyun can make that "9 times as strong". This is because weight-lifting has to do with tendons and positioning, and
Tit Sin Kyun is
Noi Gung/ Internal Skill.
There's no need to get started on the very plain and groping attempts of a number of individuals to pass themselves off as being somehow competent in this, but the true
Hung Ga community can see right through it, rest assured. The main thing, if
Noi Gung is your interest, and you aren't developing
Noi Gung results after three years of
Gung Ji/ Fu Hok, either work harder, or just quit and find another teacher, because I can practically guarantee you that the
Tit Sin Kyun is not going to be much better.
Best,
Michael