The bulk update request #9595 is pending approval.

create implication stretching_arms (398) -> stretching (11160)
create alias stretching_leg (8) -> stretching_legs (106)
create alias leg_stretch (50) -> stretching_legs (106)
create implication stretching_legs (106) -> stretching (11160)

Reason: Just some straightforward implications and a little consolidation of various leg stretching tags.