Hi every one, i used to pull conventional but then i found that i lower back is always tight and stressed. So i changed it to sumo. At the beginning, i pulled more like a semi sumo，stance was pretty close. I felt i still used a lot my lower back, its just like conventional. I decided to widen my stance. This is the second time that i do it although my stance is still not so wide. I just feel something is not clicking, not right. I feel the weight is so heavy that i can't pull. Can anyone give me some tips?
Here is the vid.