An exercise machine having a beam pivoted off center, with a weight movable along the beam under {HEAD ~ control} of {TAIL ~ a motor} 
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An exercise machine having a beam pivoted off center , with a weight movable along the beam under { HEAD ~ control } of { TAIL ~ a motor }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL