I do my squats on a smith machine, the bar is only about 10-15lbs so I have to estimate how much weight I am doing. But I feel if I use a barbell I will fall over, will doing it on a smith machine mess me up? I am gonna give it a try next time with a barbell and see if I fall over.
Smith machine squat
http://www.exrx.net/WeightExercises/Quadriceps/SMSquat.html
Smith machine squat
http://www.exrx.net/WeightExercises/Quadriceps/SMSquat.html