A friend of mine and I started lifting about 3 months ago after about a year off. We're going for heavier weights and combo movements but we're a raggedy bunch. I get on the deadlift and if I do enough weight to get something out of it I get a sharp pain and its bad for up to a week, i'm using a lower back machine but don't get the combo benefits.
Next, between the 2 of us we've had ACL tear, broken femurs, and other good stuff. Squats simply can't be done with any real amount of weight due to the back/legs issue. Any exercise suggestions for lifting heavy and safely?