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