I admire the English Longbow archers in many ways. They are one of the few groups within the archery world who do archery as historically accurate as possible. This includes arrows, hand forged historic arrow heads, shafts, fletchings, nocks, the bows, bow design, bow length and also historic draw weights and the technique to pull and release.
These are some websites I really like and recommend:
English Warbow Society: http://www.englishwarbowsociety.com/
Dutch Warbow Society: http://www.oorlogsboog.nl/
The draw weights they use are typically from 100lbs to 160lbs with some individuals shooting even more powerful bows.
One thing they always say is the "Drawing in the bow".
What does "Drawing in the bow" that mean?
Imagine a heavy metal door with 2 sides sliding sideways to open. You can stand at arms length and try to pull them apart, but you will not be successful. Go half a step forward, arms are bent now, you will have more power to slide the doors apart. If you continue this example you will see that you can transfer energy most if you are really close to the door, basically ıf your chest touches it.
Same way with a bow, the closer you come between bow and string, the easier it will get, the better you are going to be able to use your back muscles.
Why is it important?
Because this is the only way to pull a bow with historically authentic drawweight. This is archery.
There is no other way.
Why are the English longbow archers the only ones telling this?
Because they are the only ones using historic draw weights. For bows lower than 50 lbs you can use any technique. And that's what you see mostly e.g. in traditional shoots or horsearchery tournaments, people pull their 30 lbs bow not with their proper back muscles but often just with their wrist, or pull it in front of their faces calling it "floating anchor". This is not historic and you can only do it with low poundage bows.
What is the sequence of the pull?
When you start pulling you put your string arm elbow high and while pulling you bring your chest (or rather the line between your 2 shoulders) as close as possible to the bow. Almost as if you are "stepping into the bow". It is important to do this as early as possible in the draw. This way you will "roll your shoulder" as the English longbow archers say.
Why am I telling you all this?
It is exactly the same in Ottoman/Turkish flight archery. High drawweights in order to shoot farther, the only way to pull these bows is to use a proper technique where you use the correct muscles. The English call it "Shooting or Drawing in the bow", others might call it differently but for certain this is the way to do it.