The bulk update request #9595 is pending approval.

create implication stretching_arms (511) -> stretching (12488)
create alias stretching_leg (14) -> stretching_legs (138)
create alias leg_stretch (56) -> stretching_legs (138)
create implication stretching_legs (138) -> stretching (12488)

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