I'm 6'4'' and can't seem to keep a straight back while doing deads unless I set my legs a little farther apart. But according to the "expert" at my gym that is an incorrect form.
What do you guy's think??.. It seems to work for me.
you can try sumo deads
How wide do you do them? You are kinda tall so you might need to go a bit wider. Post a vid of you doing it if you can. That's the easiest way to check your form.
i do sumo style as that is the only way i seem to be able to keep my back straight.
If you can't keep your back straight its probably because you are trying to lift too much weight. Although you think you can lift that much and you probably can, you need to work up your strength with lower weights as to not damage your back!
Go down to some lower weights on the Dead and progress along with your lower back.
Dead lift is probably the #1 injury prone exercise out there due to people not keeping their backs straight and trying to go EGO vs Form!
Take it slow bro! it will come, it will come
maybe need to work on flexibility too....
Also concentrate more on driving the hips forward to complete the lift. A lot of people who round out their backs tend to keep their leg and hip movement to a minimum/standstill and try to pull with all lower back, which leads to "rounding" of the back.