I just read an article from former world record holder in the deadlift, Andy Bolton. He said that partial deadlifts are easier to learn & may be safer for athletes not looking for a big deadlift or a bigger powerlifting total. More importantly, he said they will overload the posterior chain. I have a couple of middle to high school age athletes(football, soccer, basketball & track) I'm training right now. I'm leaning towards low rack pulls(1st slot) over trap bar deadlifts. Bret Contreras study releaved that heavy rack pulls were just as effective for the hams, glutes & lower back as deadlifts from the floor. What's your opinion?