In another version, {HEAD ~ the restraints} are pulled back against {TAIL ~ the knees} when the user sits down 
are pulled back against
In another version , { HEAD ~ the restraints } are pulled back against { TAIL ~ the knees } when the user sits down
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH