Great article. I agree that there are many times where you would really like to say what you want to the client / co-worker / boss, but the problem comes in that if you say what you want you will get fired as well as potentially sit with a lawsuit on your hands - Which isn't all too pleasing to think about.
So yes, I do believe that you need to find something to relieve the stress and to keep your body active, because if you don't you might find that in 10 year's time you would've become physically sick because of not dealing with stress as well as due to not doing any physical activity.
I haven't tried to do Martial Arts yet, but what I DO do is go rock climbing indoors during the week and outdoors over weekends to relieve stress. Might not be everyone's cup of tea, but man, it does what I need it to do - Relieves a LOT of stress and it's quite a workout.
I enjoy your editorials very much, so keep it up!