Straight leg deadlifts have lower back injury written all over it,especially if going heavy..I am happy with reg deadlifts.
Thanks for the great info guys in particular ZiR RED great links big appreciation!
It looks to me from your feed back that straight leg dl's are a recipe for back injury im in serious doubt now as to whether to continue doing these in my current lifting program. They obviously have great effect on the hamstrings I can vouch for that I've been waddling proof from my last two sessions but the risk of damage to the back well is it worth it? I may try and find a substitute or maybe alternate weeks?
Check your form: http://anabolicminds.com/forum/exercise-science/190675-proper-techniques.html
RDL starts from a standing position with the weight in hands, not with the weight on the floor. Do a regular deadlift to get in position or start from pins or a safety bars in a power rack. When I do them the weight never gets anywhere near the ground, in fact if the bar goes below my knees that's good enough. You perform the RDL by keeping a good lumbar extension, i.e. with knees slightly bent keep a good arch in the lower back and stick your butt out as far behind you as can as you lower the weight until you feel a good stretch in the hamstrings. If you start to lose the arch in the lower back you've gone too low. There shouldn't be a lot of strain on the lower back, if there is you're not doing it right.
Do them from pins in a rack. You can set them at any height you need and make sure the bar comes to a complete stop before proceeding. Not bouncing will protect you back. This will allow you to brace your core with every rep. Bouncing is what cause back issues.
...or you can set the loaded barbell on 45# plates.
Stay strong and Lift Strong!
romanian dl bro do this it is the best slight bent in your knees works great also try to slightly direct your toes inwards