The bulk update request #9595 is pending approval.

create implication stretching_arms (530) -> stretching (12883)
create alias stretching_leg (14) -> stretching_legs (150)
create alias leg_stretch (60) -> stretching_legs (150)
create implication stretching_legs (150) -> stretching (12883)

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