A handgrip is modified to have a tethering window cut through one of its
upright prongs so that the stem of an impinger can be extended through it
to anchor the impinger at the outside portion of the handgrip. Anchoring
is accomplished either by the extension of the impinger's tether pegs
into sockets or apertures or by trapping the tether within a channel
formed there. Once anchored, the impinger's head is positioned within the
handgrip's cord tunnel where it becomes forced against stretchable or
non-stretchable exercise media including stretchable exercise sheet.