First off Kinobe, don't forget the general rule of thumb - your shutter speed should be equal to, or faster than the focal length of the lens you're using, for safe hand holding.
With your 70 -200mm lens 1/100 would be OK at the short end of the zoom but as soon as you zoomed to 200mm that shutter speed would be quite inadequate and you'd get camera shake evident in your images.
Don't ever take your hand holding technique for granted, particularly with long lenses, it's something you need to practice and be aware of all the time. Many a pro has suddenly found his shots not quite as sharp as they used to be and had to go back to basics.
I'll try and find a link explaining the technique for you - a picture paints a thousand words.
