Many years ago before I began Wing Tsun I studied some hakka based kung fu. One of the forms was a crane form much like the Okinawan san chin form, so it consisted of dynamic tension throughout the form. I'm now 55 years old and have been toying around with the idea of training this form again for the exercise. Am I too old for this? I remember hearing that as you get older that this type of training is bad for the blood pressure. Anybody here have some insight?