Due to a back injury consisting of a surgically fixed ruptured disk and an existing crack in my spine (L5,S1), I cannot perform squats. Nor do I want to. I have found little information on an equivelent to squats...for a back injury. I have found that some sites say horizontal leg press over vertical. My questions are as follows:
1. Why horizontal is safer than vertical? What is the difference?
2. Some horizontal machines have you sit and some have you lay down? Is there a difference?
3. What about a hack squat machine at 45 degree angle, vs. horizontal or vertical.
Any information or other sites to refer to would be greatly appreciated.