Chris one of the great things about the Takamatsuden arts is that you get quite a bit of exposure to roughly six different systems. However, even though the overall systems are broad practitioners from any of the Kans can benefit from cross training. Hatsumi Sensei came into it with a wide background in other systems. I believe this helped him as a martial practitioner. Tanemura Sensei also cross trained. Manaka Sensei also cross trained in the military. All of this training gave them a deeper perspective on the Martial Sciences which in my opinion is very important. I believe in "Scenario Based Training" that is where one or more people act out a prescribed role and the defender or defenders then react. This is excellent training and I have encouraged it since I began teaching a long, long, time ago. In this type of training I believe in a walk through of the practitioners role then pad up and see what happens. I believe in introducing variables in this type of training as additioinal stressors that the participants actually have no idea in what is coming. (ie. maybe a training knife is introduced during an unarmed session) However, I also feel it is good to "Spar" ie. against a resisting opponent both with tools (padded weapons), empty hand and also grappling. This allows a practitioner to get good at timing and distancing in conjunction with an opponent who is resisting and or attacking. Now both of the above do not need to happen all the time but...... in my opinion they are essential and practitioners benefit greatly from this kind of training. It certainly does not hurt them or make them unable in any way to function in a moment of violence. Instead do to the variety of the training it should help them deal with unpredictable variables that are one thing that is constant in a moment of violence. Traditional systems of martial practice can be excellent forms for personal protection. They may like the Takamatsuden arts take a while longer to get good at but they certainly can turn out martial practitioners that are very, very capable of defending themselves and their loved ones. This brings us to athleticism. Athleticism is important. I have been in and around athletics and athletes most of my life. While athleticism is not necessarily a prerequisite to defending oneself it is a distinct advantage if a martial practitioner is in shape with a good balance of aerobic and anaerobic exercise. (strong cardio and strength training) A martial practitioner would if they are taking their training seriously want to be in as close a state of peak physical fitness that they could achieve. A professional level athlete frankly with a little training is going to be a bear to deal with. (provided they have good attributes and mind set conducive to personal protection skills) Why should not every martial practitioner strive to be in their best physical condition? Simply they should. It is insane to argue against being in great shape. (even though it may not necessarily be necessary in some violent encounters) Bill and the other guy in the Human weapon were professional athletes (Bill being at a top tier level ie. the NFL) Their athleticism was at a much higher level than Bruce. However, Doug was closer to his opponents and it reflected in their encounter. People need to understand in my opinion that being as athletic as you can is a great advantage to a martial practitioner! Very, very important in my opinion. Let me recount a story of watching a "professional level athlete" in a room full of martial practitioners. This was a long time ago when I was teaching a seminar to Budo Taijutsu practitioiners. This seminar was geared towards "Scenario Based Training". After a couple of hours of training, coaching with instruction on how to act as the aggressors, etc. We started the drills. The professional level athlete watched as a few scenarios were held. When it was his turn he and another practitioner were paired up in a bar situation where their goal was to get out safely through an exit after being confronted. As the scenario unfurled it was rather easy for him to maneuver with his partner out. It was impressive! Mind you he had been practiticing Budo Taijutsu for a short period of time and the aggessors at this point were all his seniors by several years. Later he was in a two on one situation in a mugging and he dominated yet again against two seniors. His natural athleticism and his attribute of a longer reach allowed him to literally beat away his attackers easily even though they were more highly skilled. So I base not just on this encounter but many encounters like it as well as my own athletic skill sets and attributes that have allowed me to do the same as a good reason that practitioners should strive to be as athletic as they can be. While a system might not require you to be a athletic there is no reason not to be as athletic as you can be! Now one does not have to spar or be involved in scenario based training all the time. Too much would take away from technical training which would also be a negative. Yet, a martial practitioner will always benefit from contact and physical resistance training that is involved in sparring and scenario based training!