some agrees, some disagrees, some are it depends on the technique and purpose of the exercise. I think will done correctly--incline sit-ups are as good as anything--but you have to do them with a great deal of control--we all learned to do sit-ups in PE class, ie, see how many you can do in two minutes, etc. and that can lead to problems.
I like upright rows but with a much wider and thumbless grib and then only pulled to the mid-chest height or performed with dumbells.
Leg Press--not nearly as good as squats, but I would not say its something to be competely avoided.
Back Extension/Hyper-extension, I disagree, but I most people in metro gyms do it incorrectly
Ab twist, agree, esp, on a machine
