I've been lifting weights for several years but only recently has it approached anything resembling a coherent program. I've begun working with a personal trainer and the first thing they did was incorporate squats and deadlifts into my weekly routines. Before this I had never done either since I was told at a young age that they would lead to back problems especially if I didn't know how to properly do them.
My front squat and back squat are both roughly equal in strength. I use 175lbs for 4x10 straight sets with 90 seconds rest between sets. With the front squat I'm able to go below parallel, essentially until I'm touching my calves, while if I go much below parallel in the back squat I start to round my back. Is this the usual case or am I performing some part of the movement improperly? My weight is on my heels the entire time and my trainer says everything mechanically looks fine but I wanted a second opinion.
As far as the deadlift goes, with straight leg deadlifts I feel my hamstrings working and no strain in my lower back at all. But with the standard deadlift I feel it mainly in my lower back and that worries me a little. I've watched videos and had my form evaluated but I was wondering if there were any tips on how someone just starting to deadlift should proceed to insure proper technique is learned and the risk of injury is low.