There are a couple of Nautilus machines at my local gym (the multi-biceps and the multi-triceps) which I could use in my HST routine. Having read a lot of the thoughts on HST on this site, it dawned on me that, because these machines offer rotary resistance, stretching of the muscle on the eccentric part of an exercise should be greater than for, say, a regular barbell curl. There definitely seems to be extra pull at peak contraction and when the arm is fully straightened compared to a regular curl. Also, the machine looks like it would lend itself to negatives. Any thought on this? Any of you out there use Nautilus machines in your HST routines?