Honestly this guy apparently knows a lot about martial arts but listen to the tripe he writes, he should stick with martial arts...Dead Lifts: Exercise That Destroys Your Lower Back - Article by Matt Furey

Honestly this guy apparently knows a lot about martial arts but listen to the tripe he writes, he should stick with martial arts...Dead Lifts: Exercise That Destroys Your Lower Back - Article by Matt Furey
possibly the worst if you do them incorrectly, possibly the best if you do them correctly
Actually this exercise is really good if you have a weak back which translated to lower back pain. Or if you play sports and have a weak back and you get a lot of transition of energy from the upper to lower body(jumping in basketball). It will make you get over lower back pain that comes from weak muscles in time. It's the same with tendinitis and weak legs.