Does not support 200 lbs or a pull up would be way easy for a 137 pound person??

I bought this and only weigh 137 so should be able to do a pull up no problem on the most helpful link meaning easiest setting. I am only pull myself up a few times and that's it. If it truly supported 200 pounds this should be a breeze for me to do several pull ups and its not.... NO way it supports 200 pounds....

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